A bakery (or kitchen) is just a glorified chemistry lab, and there are amazing, fun and visually stimulating experiments you can do with simple baking ingredients, in your own home.
The first is the Baking Soda Volcano. The procedure is simple. Fill a regular drinking glass with a half a cup of vinegar. Place the glass in a larger Tupperware (to collect the overflow). To the glass with the vinegar, add a quarter of a cup of baking soda and stand back. The bubbling concoction will overflow like a volcano. The chemical reaction between sodium bicarbonate and acetic acid (vinegar) produces proliferate amounts of CO2 (carbon dioxide gas). For the more creative, you may construct a papier-mâché volcano around the glass with the vinegar.