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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 arts and crafts activity about animals and animal characteristics, learners will design animal hats and role-play as animals.

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.

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

In this quick activity (page 2 of PDF), learners will play a game using their observation and listening skills, interpreting clues from each other to deduce their secret animal identity.

In this math activity, learners use a "function machine" to collect and organize simple data. The function machine in this case is a cardboard box and the input/output data are paper fish.

In this game, students will become familiar with fish shapes, learn that fish within a given taxonomic family have similar body shapes, and discuss how different body shapes enable fish to survive in

In this activity, learners perform an experiment that models a chromatography-like process called electrophoresis, a process used to analyze DNA.

In this art/science/math activity, young learners are introduced to the concept of symmetry in nature.

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

In this activity, learners assemble large cubes to make nano-related images. Learners discover how different objects are related to nanoscience and nanotechnology.

In this activity, learners explore the concepts of natural selection and observable traits in a game that can be played at home.

In this activity, learners explore the work of paleontologists.

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.

This activity introduces learners to wolf behavior and communication.