High-quality weight with a hook fitted through the center allow you to hook weights together in tandem or use them one at a time.
Pass-through hooks are included on both sides of the weight!
This is a great clean heat demonstration model for the classroom setting!
Defy gravity with this cool balancing eagle!
Build a model car that runs on hydrogen gas using a unique reversible fuel cell!
Caution! The fun found in this potato clock kit will SHOCK you!
Great tarantula specimen for the science classroom!
Create all kinds of marble run combinations with this 80-piece Marble Run set!