Again, from the Steve Spangler website, here is a fun experiment for kids to try, with adult supervision of course.
Your child will need the following:
5 or 6 tea light candles
A see-through container made for pouring
Step one- Line up the candles and light them with a match or lighter. (This is where parental supervision is needed).
Step two- Pour some baking soda into the bottom of your container, enough to cover the bottom.
Step three- Pour the vinegar over the baking soda, enough to make it foam up.
Step four- Without pouring out the mixture, put out the tea lights. (Marcus demonstrates this step really well).