As I've mentioned it is science fair time. For the next couple of days we tackle the kindergartener's project. She'll be finding out what yeast eats.

Today we read a little bit about how bread is made, talked about the ingredients and observed that there were lots of tiny little holes in bread. Then we took half a cup of very warm water and mixed in a teaspoon of sugar. On the top we sprinkled 2 teaspoons of yeast. After about 3 minutes we took a spoon and played with the bubbles on top. Wow! There were tons of them. I explained a little bit about fermentation to Sadie (although I didn't use that word at first). The yeast "eats" the sugar and makes a gas called carbon dioxide. She took a sniff and then a little taste. I explained to her that the bad taste was the other thing the yeast makes when it eats the sugar, alcohol. We came up with a few things to test to see what else yeast eats - flour, salt, honey, apples and potatoes.

I'll show you how we measure the carbon dioxide tomorrow. In the meantime, take a look at the story of yeast and other experiments you can do.