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In this activity, learners explore chemistry and the microbial world by making their own sourdough starter and bread at home using only flour and water.

In this hands-on activity, learners use heat to shrink samples of polystyrene plastic (#6 recycle code). Learners compare the size and shape of the plastic pieces before and after shrinking.

In this challenge, learners figure out how to make a juice stain disappear.

Learners experiment with a piece of Silly Putty® by stretching, bouncing, and snapping it. They then create flubber, a similar substance, by mixing diluted glue and a solution of sodium borate.