In this multi-step experiment (page 4 of pdf), learners study tide pools, and then drop a "wave" (a 4-pound bag of beans or birdseed) on a shell to mimic the force of crashing surf on tide pool animals. Next, learners create tide pool animals from card stock, masking tape, and string and predict how well their creature will withstand the 'wave.' After dropping the "wave" on the hand-made animals, learners record the results and discuss why some animals fared better than others. This is a great activity to use before or after a field trip to a tide pool or an aquarium with a tide pool exhibit.