Amazon has the Klutz Lego Chain Reactions Science & Building Kit in $13.08 with free shipping for Amazon Prime or orders over $25.
- Nappa silver award winner.
- Design and build 10 amazing moving machines.
- Comes with 80-page instructions, 33 LEGO pieces, Instructions for 10 modules, 6 plastic balls, string, paper ramps and other components.
- Recommended for children ages 8+.