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Origami Frog and Flea

Use the ancient art of paper folding to create a frog and flea.
You can also test your engineering and design skills to see if you can think of ways to help your creatures "leap" or move higher or farther.

You will need:
  • For each creature, you'll need one piece of paper cut to 4" x 8" (You can use any plain or color office paper, or origami paper.)
  • Optional - scissors, drinking straws, tape, markers or crayons or othr items to decorate the creatures.
  • Start by cutting up enough pieces of paper to 4"x8" so you have a few to experiment with.
    The frog includes more photos of the very first few folds, so you might want to fold your frog first. See diagrams for folding instructions.Origami Jumping Frog


    Origami Jumping Flea 150

































    Things to Try

    Once you have your origami creatures done, try getting them to move forward, or jump up.

    What happens if you tap the back end?
    What happens if you hold the back edge down, then let the paper slide out from under your finger to release it? 
    What happens if you try blowing at their back ends through a drinking straw?
    Could you hold a race? How you would measure what a "win" is (farthest, highest)?

    Could you re-design them to leap farther, or to always land upside down or always upright?



Bubble Snakes

Create fun bubble and foam makers at home! Make long “snakes” of foam, and have more bubble fun, using a few simple items!

Note: For more bubbly fun, next time you visit Explora, check out our new exhibit area, Curious Bubbles/Burbujas curiosas, which just opened December 18, 2015!Try at Home Bubblesnake IMG 0572 re JPG cropacWeb400pw
You will need:

  • Small plastic soda/beverage bottles (Note: Sturdier, thicker plastics will hold up a bit better than the thinnest easy-to-crush water bottles)
  • Scissors to cut plastic
  • Small socks such as kid’s socks from a dollar store
  • Food Coloring
  • One or more: Bowl, pan, or plastic tub – large salad or mixing bowl size
  • Dish soap, such as Dawn
  • Tap water
  • Optional: Food Coloring, Pipe cleaners, other plastic cylindrical items, and white paper.

Note: Can be messy & wet. Food coloring may stain. Consider the location and set-up of your experiment.

1) Prepare a bowl of water with a few spoonfuls of dish soap added to it.
2) Cut the bottom off of the soda bottle, leaving the other end as it is.
3) Pull a sock way up over the cut end of the bottle up the sides so it stays on well.
4) Dip the sock end of the bottle down into the bowl of soapy water and lift it out of the water, blowing through the drinking end of the bottle to make a long “snake” of bubble foam.

  • Things to try:
    How long a bubble "snake" can you make?
    How does varying the ratio of dish soap to water affect the bubbles?
    What happens if you use a sock that is less tightly woven?
    Does it make a difference if the sock is cotton, wool, synthetic, or a blend?
    What about trying other fabric, tied around the end with a rubber band, like a wash cloth or panty hose?
    What happens if you try different widths or lengths of plastic bottles?
  • Options:
    In addition to bubble snakes, you can also try blowing bigger bubbles directly through things like a small yogurt cup or small plastic bottle with the end cut off.
    You can make bubble wands with long pipe cleaners found at craft stores – Try different shapes on the end of your wand, like circles, squares, or triangles! Or a sphere, a cube, or a pyramid!
    To make colored soap bubbles, add a little food coloring or water color paint to the soapy water (protect surfaces and clothing from stains)
    To make bubble art, try blowing a bunch of highly colored bubbles, then pressing white paper over the bubbles.
    Try Bubblesnakes IMG 0587 12 2015 re ac JPG crop Web 300pw     Try Bubblemaker adding color IMG 0593 re acWEB     Try bubblesnake art IMG 0600 re ac Web 214 pt

 

Ice, Ice, Go Away

What can you use to melt ice? Put your ideas to the test in this colorful experiment about water erosion and freezing point.
Try Ice IMG 1712 webb 1


You will need:

  • Tap water
  • Containers in which to freeze water (small paper or plastic cups, or ice cube trays)
  • Salt, such as Table Salt, Epsom Salt, Sea Salt, or Rock Salt
  • Any or all of these: Sugar, Vinegar, Baking Soda, Hot Water
  • Food Coloring
  • Measuring Spoons, to put liquids & powders on the ice.
  • A Clock or timer
  • Cookie Sheet with rim, shallow pan, or foil in which to place the ice - big enough to hold the liquids as the ice melts.

Note: Can be messy & wet. Food coloring may stain. Consider the location and set-up of your experiment.

1) Prepare your ice several hours or overnight before your experiment: Freeze tap water in ice cube trays, or fill small disposable cups or containers 2/3 full and freeze them to make small "ice towers."

2) Make predictions about which substances you think will melt the ice in different ways, such as the fastest, the most complete melt, or the most interesting or intricate pattern.

3) Take some ice pieces out of the freezer. Remove ice from the container, and place the ice in your cookie sheet/pan. (Alternatively, you might want to start by testing one ice piece at a time, observe it and time how quickly it melts, then test another.)

4) Measure a small amount of one substance on one piece of ice, and then add the same amount of a different substance on a different piece.

  • Are the different ice pieces melting in the same way?
  • Add a few drops of food coloring to each. What do you notice? Can you see what is happening "inside" the ice?

You can set up many different experiments, and make colorful "ice erosion" art: Take photos of your ice in various stages, and share your results on Explora's Facebook page!

  • Did you notice the water feeling colder than the ice cube? Salt and some other substances lower the temperature at which water freezes (Think about oceans!). Salt can be used in homemade ice cream making for this reason. It makes the ice cream cold enough to freeze.

For some more science explanations and fun homemade ice cream making instructions:
http://www.sci-experiments.com/ice_cream/saltwater.html 

TRY Ice IMG 1721 webTry ice IMG 1727 pic blue web

 

 

 

 

 

Electric Balloons

How can static electricity be used
to move a soda can?
Try Electric balloon race IMG 8012 web


Each participant will need:

  • Balloons
  • At least one empty soda can
  • A head full of hair

Each person who wants to try this will place an empty soda can on a flat, smooth surface. Rub an inflated balloon on your hair really fast to build up a static electric charge on the balloon. Hold the charged balloon about an inch from the can, then slowly move it away from the can. Practice your technique to get the best movement. You could have a race or other contest. May the fastest or most well-directed can- with the most electrified balloon- win!

  • How fast will a soda can move?
  • Can it move up an incline?
  • Does it matter if your hair is wet, or contains other products?
  • What happens if you rub the balloon on fur, wool, cotton, or silk instead?
  • Can the charged balloon affect anything else? 

 

Bubbles and Soap Film Experiments

While free-floating bubbles are spherical, soap films can take on many different shapes. It all depends on the bubble wand.

TRY 062609 03754-soapfilms-WEB


You will need:

  • Pipe cleaners (chenille sticks)
  • Dish soap (Dawn or Joy works best)
  • Plastic tub deep enough to submerge your wands
  • Water
  • Optional additives to soap solution:
    - Baking powder
    - Guar gum
    - Glycerin
  • Optional items to blow bubbles through:
    - Individual serving size yogurt tubs and/or
      thin plastic drinking water bottles, with ends cut off
    - Plastic hair curlers

Caution: Prepare to get wet and soapy. Surrounding areas will be slippery!

To make your soap solution you can experiment with the soap type or concentration.
A typical mixture uses a dilution of about two tablespoons of soap per cup of water, or for a larger tub, use 1 part of dish soap to 3½ - 4 parts of water. After you've got your favorite concentration of soap and water working, as an additional experiment, you may want to try adding very small amounts of baking powder, guar gum, or glycerin (start with less than a teaspoon).

To make soap film wands, experiment with pipe cleaners to create a variety of shapes. For simple bubble blowing, you can make flat, 2-D shapes on the end of the pipe cleaner, to blow bubbles through. Twist or braid a few pipe cleaners together to increase their strength when you dip them in the soap solution.

  • Does the shape of the wand make a difference in the shape of the bubble formed? What happens when you try blowing through a tube, such as one of the optional items above? Does the length or width of the tube matter? What else could you blow bubbles through?
  • What do you notice about the colors and the patterns of the bubbles or the soap films on the wands?
  • Do they change over time?

You can also experiment with bending the pipe cleaners into three-dimensional shapes. To help form your shape, you can bend the pipe cleaner around a small tube or box.

  • How many different shapes can you make?
  • What do you notice about about the shape of the wand, and the shapes formed by the soap films?
  • Do the films rearrange into a new shape if you pop some of the sides?

Pipe cleaners make good bubbles because they hold a lot of liquid, but they drip a lot! You can try other materials for your bubble wands such as plastic or metal wires, canned beverage six-pack rings, yogurt lids cut into spirals and more! Explore this website for more ideas on geometrical wands.

 TRY 062609 03767-soap-filmsCloseup WEB    OUT FAM IMG 1178 re CropcloserWeb

 

Ooh-La-Lava Lamp

Oil and water don't mix, but you can use that
to your advantage to create a temporary and easy
homemade "lava lamp."TRY-Lava IMG 0338-cropWeb400pxw


You will need:

  • Cooking oil
  • Water
  • Salt
  • Food coloring (optional)
  • A tall clear container (a glass or a narrow bottle)

Fill your container two-thirds full of water (optional: mix in a few drops of food coloring for contrast). Pour enough of the oil to get a half-inch layer on top of the water.

  • What do you notice when you sprinkle varying amounts of salt on top of the oil?
  • What happens if you use sugar instead of salt?
  • Do other liquids work as well?

TRY Lava-glass-close IMG 0362-re-Web

This lava lamp uses two insoluble liquids that have different densities, with the less dense oil floating on top of the denser water. When salt is sprinkled on the oil, it sinks and drags oil droplets to the bottom. As the salt dissolves in the water, it releases the less dense oil droplets, which float back up. Commercial lava lamps work differently. Heat at the base of the lamp causes the denser liquid at the bottom to warm up and expand, becoming less dense and rising to the surface. As it cools, it becomes denser and returns to the bottom, where heat begins the cycle again.

 

  

 

Sink or Float?

Some objects sink and some float. Can you design one that does both, like a submarine?


You will need:

  • One or more plastic film canisters* for your "submarine(s)"
    *You may get empty film canisters from many local photofinishing locations that process film, and if you have a choice, the clear-whitish ones let you see what's going on inside!
  • 2 liter soda bottle with the top third cut off to hold your "ocean"
  • Water
  • Several Alka-Seltzer® type of fizzy tablets
  • Handful of pennies
  • Scissors

Carefully, make a small hole on the lid of the film canister with the pointy ends of a pair of scissors. (Adults help younger kids). Fill up your ocean two-thirds of the way with water and you're ready to go diving! 

  • How can you make your submarine sink to the bottom of the ocean?
  • What is the fewest number of pennies you can add to get it barely sink?
  • What happens when you now add a piece of a fizzy tablet to your submarine and close the lid? It may splash a bit!
  • Does the amount of water or fizzy tablet make a difference in the action of your submarine?
  • How can you get your submarine to sink, and then slowly rise to the surface two, five, or ten seconds later? Does it matter how your submarine lies on the ocean floor for it to be able to float back up?
  • Does the size of the hole have an impact on the way the submarines behave?

 

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