A pocketable demonstrtion of the center of mass.

Be a guerilla gardener!

A fun air-propelled little car

Create a lovely snowy white rock garden in days.

Makes 2 cups of cool snow-like stuff with interesting water absorbing properties.

This biodegradable latex balloon is at least 3 feet, maybe bigger when inflated.

Dissect this sanitary owl pellet which contains the skeletal remains of an owl meal.

This pocket sized hypotrochoid stencil, gears & pens allow for endless variations and possibilities.

A semi-ellipsoidal top—it spins in only one direction, seeming to violate the angular-momentum conservation law of physics.

Use the sun to make things go.

Kit packed with one pellet, bone chart, probes and instructions.

Ulexite, the amazing fiber optic mineral.