Crazy Circuits is a modular electronics system designed to fit onto LEGO® bricks or similar brick building systems. Circuits are created by “wiring” Crazy Circuits parts using conductive tape for LEGO® projects or conductive thread for sewing projects, to add light, sound and motion. Crazy Circuits parts come 100% ready to use, which means no soldering or preparation is required. Detailed directions, project guides, educational resources, and videos can be found in Brown Dog Gadgets' online database.