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This activity has learners interacting with live crayfish, but could be adapted for a variety of similar hardy and interesting organisms.

On an imaginary fossil hunt, learners "find" (remove from envelope) paper "fossils" of some unknown creature, only a few at a time.

In this activity, learners work in teams to investigate the composition of unseen materials using a variety of tools.

In this activity, learners consider how a simple machine, a lever, turns a small push or pull (a small force) into a larger--or stronger--push or pull (a larger force).

In this activity, learners separate the protein from milk and and use it to make their own glue.