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This design challenge is an open-ended exploration of linkages, a group of parts connected by hinges, and the types of motion they can create.

In this activity about dinosaurs, learners first participate in a group discussion about where and when dinosaurs lived, how big they were, and who studies them and how.

This is an activity about dinosaurs, fossils, and the work of paleontologists. Learners use hand tools (paint brushes, scoops, and sifters) to unearth fossil specimens in tubs of birdseed.

In this activity, early learners simulate fossil prints in play dough or clay.

In this activity, learners play a game to simulate the food chain.

In this activity, learners will explore the roles of different animals in the food chain. They will create their own food chain using organisms of their choice.