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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, learners will experiment with water- and air-filled balloons as a way of dampening sound before it reaches their ears.

In this activity, learners will create their own simple shadow puppets, and experiment with light and shadow while playing with them.

In this activity, learners will see how UV light affects colors over time by making their own sunprint on construction paper.

In this activity, learners thread gumdrops together to make a model of a polymer.

In "Chemistry is Colorful" learners explore different materials through paper chromatography.

In this activity/demo, learners are introduced to the connection between medieval stained glass artisans and nanotechnology.

"Nature of Dye" allows participants to create their own dyes and art while exploring how chemicals interact and how these interactions can have real-world applications.

In this activity, learners will write a secret message that only their friends will be able to read.

In this activity, learners discover that some plastics will shrink when you get them hot. Learners bake polystyrene in a regular oven and discover what happens.

In this activity, learners will construct an air cannon as a model for the human ear.

Learners will explore the chemistry of mucous and its importance to our health by following a process to make their own replica "snot." The activity includes a time and age recommendation, a materials

This activity introduces learners to the structure and properties of carbon nanotubes.

In this activity, learners use objects they find on a nature and water to make creative frozen sculptures.

In this activity, learners design and build their own parachute using household materials with the goal of landing their passenger safely on a target.

In this activity, learners design and build a toy top out of simple, everyday materials and have the option to use the toy as an artistic tool.