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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.

In this activity, learners observe hard parts of sea creatures (shells, molts, etc.) to better understand marine environments.

In this hands-on activity, learners discover the similarities and differences between a vertebrate and invertebrate by dissecting a perch and a crawfish.

In this activity, learners use earthworms as "unknown creatures" from the South American jungle to find out how animals use senses.