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.

Create and control a phenomenal vortex.

Complete, uncut, unabridged, but crack open this rock to find a crystalline interior.