After practicing this activity before Christmas, we have managed to improve our technique and reaction times. Now everybody can catch the ruler at the 2cm mark or below even after taking part in strenuous exercise first.
We found Building a Robotic Arm a really fun activity. The Warriors Space Cadets came up with a whole variety of designs . We set them the challenge of which robotic arm could carry a piece of Lego and a table tennis ball for the longest period of time.
It was a bit tricky at first as everyone was dropping the ball but after a bit of practice , we finally got the hang of it.