These 1/4 inch thick glass plates are ideal for testing the hardness or softness of minerals. By scratching the mineral in question against the plates, students or teachers can determine these properties by observing the quantity of residue left behind. Excellent for use in the classroom, or at home for aspiring geologists.
Build 14 assorted solar robots, some of which can travel over water!
See the constellations visible in the Northern Hemisphere on this watch!
This advanced physics kit is perfect for older children already versed in physics knowledge!
An unconventional ball-tossing, head-catching challenge for 2 players or teams!
Build 20 different solar powered models with unique building pieces, controlled by an RC handset!
This classic desk toy will keep you amused!