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

In this activity (on page 2 of the PDF), learners explore surface tension by adding pennies to cups which are "full" of plain water or soapy water.

In this activity, learners will create their own bubble solution. Learners will explore chemistry, geometry and trial and error through this activity.

In this activity, learners combine two substances (plaster of Paris and water) to make a cast of an object's imprint in clay.