Santa's Sack experiment

Seahorses class had a letter from Santa asking them to help him decide on the best material to make his sack out of plastic, foil and paper. They had to test each to see if it was strong, waterproof and opaque. The children each had to make their prediction. We tested each and the result was that the plastic was best as it was waterproof, strong and opaque. The children thoroughly enjoyed this activity.