This 100g calibration weight is perfect for general laboratory, commercial or classroom use. You can use it to calibrate digital scales that require 50g of weight. Clearly marked for easy storage.
Build your own windmill generator kit by recycling a plastic bottle!
This black scorpion specimen is great for the classroom setting!
An unconventional ball-tossing, head-catching challenge for 2 players or teams!
See the constellations visible in the Northern Hemisphere on this watch!
Build 14 assorted solar robots, some of which can travel over water!
Make the coolest 3D pin art on your desk with this amazing desk toy.