The Gilbert "Cloud Chamber" is part of the Gilbert U-238 Atomic Energy Laboratory, which was a toy laboratory set marketed towards children. The cloud chamber allowed the user to view alpha particles traveling 12,000 miles per second.

The cloud chamber consists of a steel base with three steel stands that support a glass light bulb. A red-coated wire is attached to the top of the build with a rubber stopper and connects to the deionizer. Two steel stands support cylindrical compartments. Inside these compartments are yellow and black coated wires which attach to the deionizer. The Deionizer is an egg-shaped steel object with a flat steel base with wires terminating from both sides. It has a steel push button on top and an electrical cord. A rubber hand pump can be attached to the glass bulb, or "chamber", underneath the base.