The molecules and atoms vibrate at higher temperatures and begin to push apart from each other. This phenomenon is known as thermal expansion. Simply heat the brass ball for two minutes. This will cause the ball to expand; hence it will not fit through the ring. When the ball cools down, it will once again fit smoothly through the ring. Great for the classroom or the home laboratory!
Easily assemble a working alarm motion detector!
The Ball of Whacks is the perfect creativity tool for innovators, artists, engineers, writers, students, and you!
A combination of three of our great discovery toys, all in one package!
Use this temperature-controlled soldering station for a variety of soldering applications!
Build your own windmill generator kit by recycling a plastic bottle!
This high precision gyroscope will amaze you with rotational speed and ease of precision.