1.     Put two tablespoons of corn flour into the bowl
2.     Add a table spoon of water to the flour stirring well with the spoon. Keep adding water a few drops at a time until the goo is thick and creamy.
3.     Can you feel a difference between stirring it fast and slow?
   Tap the top of the Goo quickly, does your finger sink in?
   Pick up the goo and roll it between your fingers and feel the texture. What does it feel like?

    Stop rolling - what happens?
4. Make sure you wash your hands when finished.

When you roll the goo, it feels dry and hard, like a solid.  When you stop rolling, it slowly spreads over your fingers, like a liquid.  Cornstarch particles float in water.  When you roll it, the particles are forced together and when you stop rolling, the water and cornstarch separate again.   It is a bit like quicksand. 

Jelly tots or similar sorted into three colours

Toothpicks (or spaghetti)

Bowl 

1.  Give each different atom a colour.  Hydrogen = red; Oxygen = yellow and Carbon = green.

2.  Make a water molecule (H2O) - this means that two hydrogen atoms are joined to one oxygen atom to make water.  Join two red sweets to one yellow sweet with toothpicks.

3.  Make a carbon dioxide molecule (CO2) - this means two oxygen atoms are joined to one carbon atom.  So, join two yellow sweet to one green sweet with toothpicks

 4.  Cubs can eat their molecules when done 

• Borax (found in the laundry section of the store)
• Cornstarch (found in the baking section of the store)
• White glue (e.g., Elmer's glue - makes an opaque ball) or blue or clear school glue (makes a translucent ball)
• Warm water
• Food coloring (optional)
• Measuring spoons
• Spoon or craft stick to stir the mixture
• 2 small plastic cups or other containers for mixing
• Marking pen
• Watch with a second hand
• Zip-lock plastic baggie

1. Label one cup 'Borax Solution' and the other cup 'Ball Mixture'.
2. Pour 2 tablespoons warm water and 1/2 teaspoon borax powder into the cup labeled 'Borax Solution'. Stir the mixture to dissolve the borax. Add food coloring, if desired.
3. Pour 1 tablespoon of glue into the cup labeled 'Ball Mixture'. Add 1/2 teaspoon of the borax solution you just made and 1 tablespoon of cornstarch. Do not stir. Allow the ingredients to interact on their own for 10-15 seconds and then stir them together to fully mix. Once the mixture becomes impossible to stir, take it out of the cup and start molding the ball with your hands.
4. The ball will start out sticky and messy but will solidify as you knead it.
5. Once the ball is less sticky, go ahead and bounce it!
6. You can store your plastic ball in a sealed Ziploc bag when you are finished playing with it.
7. Don't eat the materials used to make the ball or the ball itself. Wash your work area, utensils, and hands when you have completed this activity.

Epsom Salts

Black paper/card

Star stencil

Sponge

Warm water in cup or bowl

1. Cut a star shape stencil out of card
2. Dissolve Epsom salts in half a cup of hot water.  Keep adding salt until no more will dissolve
3. Dip the sponge into the water.  Place the stencil over the black paper, rub the sponge over the star shape onto the black paper
4. Carefully lift the stencil to another area on the paper.  "Paint" more star shapes with your salt water until you run out of room on the black paper
5. Let your paper dry.  The crystal stars will appear!

 The Epsom salts dissolve in the water.  When the water evaporates, the salts are left behind, forming small crystals on the paper.

baking soda

vinegar

plastic bottle

balloon

funnels

4. When ready, lift your balloon and let the baking soda fall into the vinegar.

The science behind it - Baking soda and the vinegar create an ACID-BASE reaction. When combined/mixed they create a gas - carbon dioxide. Gasses need room to spread, so the carbon dioxide fills the bottle and then moves into the balloon inflating it.