Quick, make a guess, what's shown in this picture?
It's a piece of lego stuck inside a test-tube-like container, one of Sean's numerous daily stunts. There were other pieces blocked by this piece. See picture below.
Brian was given this container last week when he went on a field trip to Coca-Cola Factory, as part of this Unit of Inquiry titled "Made you Look!" which is about Advertising. The tube is about 6 inches tall, but when heated up to 240 deg celsius, it starts to melt; it's then blown at very high pressure, to become the 1 litre Coke plastic bottle we find in shops.
Sean was thus a bit panicky when he couldn't get his lego out of his korkor's precious bottle, and quickly came to me for help.
An opportunity to conduct a long overdue and simple experiment.
Objective: To show that solids expand when heated
1. The test-tube is heated up with hot boiling water.
2. Lego pieces come unstuck.
Conclusion: The heated test-tube expands, becomes bigger and hence looser, allowing the lego piece and its brothers to come unstuck.
And Mummy saves the day once again :)