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In this activity, learners make a model of a beehive using simple materials.

Have you ever heard of a camera without a lens? In this activity, learners create a pinhole camera out of simple materials. They'll see the world in a whole new way: upside down and backwards!

In this activity, learners try to figure out who has their matching rock type by reading a description of their rock (no talking!).

Make a kite out of a garbage bag, shower curtain, painting tarp--anything light, thin, flexible and plastic!

This outdoor activity/field trip requires a place where minnows swim, such as a local pond or brook.

In this activity, learners will build the highest tower they can out of recycled materials.

In this activity, learners build unique yo-yos, which spin round and round without moving up and down.

In this math-based activity, learners will experiment to find how height and angle affect spatter and then use this knowledge to solve a crime.

Learners create beautiful fluid motion. They explore fluid dynamics, surface tension, solubility, and buoyancy while mixing liquids together.

Build a house you can fit inside, using cardboard tubes.

In this activity, leaners explore building techniques by recreating the story of The Three Little Pigs.

In this activity related to microbes, learners create scale models of microorganisms and compare relative sizes of common bacteria, viruses, fungi and protozoa using metric measures: meters, centimete

Play-Doh is conductive! Use the semiconductive qualities of Play-Doh to make your own squeezable instrument. Pico Cricket is required.

This lesson (on pages 46-55 of PDF) features two strategy board games -- one from Ghana and one from China. The first game, Achi, is a cross between checkers and tic-tac-toe.

In this outdoor activity and game, learners explore how animals adapt for survival through coloration, markings and camouflage.

In this design challenge activity, learners add headphones to a previously built instrument (see "Build a Band" activity) to make it easier to hear.

This activity is a hit for family events and all ages—some will finish in 45 minutes; others can go on for hours.

In this activity, learners will predict the size of a giant scale model of a comb or other rectangular object, then make one. If you tripled the size of a dollar bill, could you sit on it?

In this archaeology activity, learners consider ways in which excavating an underwater site is different from excavating a terrestrial site.

Learners explore capillary action in plants (such as plants ability to move water from roots to leaves) in an investigation called Paper Blooms.