Dancing Raisins!

Here's a fun experiment that you can try at home!

You need:
Lemonade
Raisins

What to do:
Pour some lemonade in a cup and then add a few raisins.

What's happening:

Raisins are denser than the lemonade, so initially they sink to the bottom of the glass. The carbonated soft drink releases carbon dioxide bubbles. When these bubbles stick to the rough surface of a raisin, the raisin is lifted because of the increase in buoyancy. When the raisin reaches the surface, the bubbles pop, and the carbon dioxide gas escapes into the air. This causes the raisin to lose buoyancy and sink. This rising and sinking of the raisins continues until most of the carbon dioxide has escaped, and the lemonade goes flat. Furthermore, with time the raisin gets soggy and becomes too heavy to rise to the surface.