Today I presented the Cushion a Water Balloon's Fall challenge mentioned in my post below. The kids were amazed that I was actually going to cut the balloon loose and risk it breaking. And they took the challenge to save it very seriously. So seriously in fact that they completed the challenge with time to spare, and in both cases, the balloon survived the fall! I was quite impressed with their ingenuity and use of materials.
The difference between the two solutions was as usual, impressive. But I was more impressed that one child, comparing the two solutions, mentioned how different they were. Ah, they are catching on quickly!