The Chain Reaction Steps: A toy car compressed against a metal spring is released at the top of a table. The car shoots forward and crashes into a line of upright dominoes. The last domino falls off the edge of the table and lands on a computer keyboard's spacebar, which activates a desk fan. The desk fan turns on and blows air, pushing a lightweight sail toy boat across a small tray of water. The boat hits a heavy water bottle resting on the edge of the tray. The bottle falls over, pulling a tight string attached to its cap. The other end of the string is tied to a toggle light switch, flipping the switch down to turn on a lamp. Mehr sehen