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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 problem-solving, learners build a house for the Three Little Pigs using twenty straws and two index cards.

In this outdoor activity, learners build bird nests and place them in the activity area, then play the role of naturalists as they try to locate each other's nests.

In this activity, learners create an origami model of DNA, demonstrating its double helix structure.

In this engineering/design/arts and crafts activity, learners design and build "platforms" or "bridges" that can hold weight, and test which glue makes the strongest structure.

No glue is needed for learners of any age to become marshmallow architects or engineers.

In this activity (page 4), learners work in groups to plan and build large structures using recyclable materials they have brought from home.