Contains 46 bricks including 2 LEDs

• 4-in-1 build set: build an airplane, helicopter, shark or insect
• No Wires! Build circuits directly into your projects
• Light up your 3D circuits with our unique power block
• Compatible with other building brick setsInstruction sheet included
• Two (2) 2-way Green-Red LEDs, six (6) tin-plated conductive parts
• All parts are fully compatible with other major brick brands
• 46 total pieces • Requires one 9-volt battery