- 1/2 tsp Borax (found in laundry section) You may have some left over if you made the laundry detergent.
- 2 TBS warm water
- 1 TBS corn starch
- 1TBS glue (clear glue makes a see transparent ball and white glue makes an opaque ball)
- 2 small mixing bowls or cups
- a stirring stick (plastic spoon)
- food coloring (optional)
Acid Based Reaction to Blow Up a Balloon:
- baking soda
- small funnels
- empty bottle like a soda or water bottle
- 1/4 c. dish washing liquid
- 1/4 c. vegetable oil
- 1/4 c. vinegar
- 1/4 c. karo syrup
- 1/4 c. honey
- 1/4 c. rubbing alcohol
For this project you're learning how the air around us will expand and contract when exposed to hot and cold conditions. You could even use the balloons you blow up from the project above. Your tires do the same thing by the way, that's why it's important to know how to air up your tires.
First you'll need to measure your balloon at room temperature. A fabric measuring tape works best for this, which you can find in your sewing/fabric aisles- that's what they're normally used for. Mark down your measurements throughout the project.
Expose your balloon to heat first, a hair dryer will work perfectly for this, just point the blow dryer at the balloon for a few minutes, allowing it to heat up. Be careful with this, it may pop with the expansion. Quickly measure the balloon and mark down the measurement- it should have gotten larger.
Then, using the same balloon, pop it in the freezer for let's say 15 minutes. Take it out and quickly measure it again, it should be smaller. Then allow it to sit at room temperature for 30 minutes to an hour to make sure it's completely back to it's original temperature and measure again. Is it the same size as your first measurement? Discuss your findings with your child.