Small booklet that gets you started in the wonderful world of rocks, minerals and crystals.
Includes answers to these questions:
Create all kinds of marble run combinations with this 80-piece Marble Run set!
Is it a demonstration of a scientific law or a work of art?
This illuminated orbiter is great for demonstrations in the astronomy classroom!
This simple but amusing magnetic toy will keep you busy for hours!
Create beautiful art with this amazing sun paper!
A perpetual motion model of the galaxy, makes a good desk toy.