Institute of ImaginationRobot LabRobot Lab

Step 3 of 6

Make an arm that stretches

Cross two strips and pin them through their middle holes. Make a second crossed pair and lay it just beyond the first. Pin its two near ends to the first pair's two far ends. Squeeze the two ends nearest you. What does the far end do?

Two pairs of crossed card strips, each pinned through the middle and pinned to each other at the ends; squeezing the near end together makes the far end reach out