Build 3D structures with exciting light effects. All the parts snap together easily - no tools required. In addition to the standard horizontal circuits, the included modules allow you to build circuits vertically and even upside down. Comes with more than 50 parts, including a 3-color light tunnel, projector with 6 images, mirrors and reflecting circuits. Compatible with other Snap Circuits sets, too. For ages 8 and up. Requires 3 AA batteries (sold separately).