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In this chemistry challenge, learners identify an unknown white powder by comparing it with common household powders.

In this chemistry challenge, learners identify which plants have the enzyme "catalase" that breaks hydrogen peroxide into water and oxygen.

Learners are challenged to discover the relative densities of colored liquids to create a rainbow pattern in a test tube.

In this chemistry challenge, learners work to figure out which of four juices are real, and which is just food coloring and sugar.

In this chemistry challenge, learners systematically investigate which combination of four solutions produces a deep red color.

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

Learners are challenged to create solutions that conduct electricity and make a buzzer buzz (or an LED light up).