Maximum Cubelet
The Maximum Cubelet accepts many different inputs but only passes along the one with the greatest value. With a maximum block, you could easily build a robot that performs an action only when a sensor reads a value over a certain threshold (set by a Knob Cubelet, perhaps). This Cubelet is pre-loaded with the newest Cubelets operating system, Cubelets OS 4.
$24.95
Cubelets are for builders ages 4 and up.