In a unique physics lesson, John makes a solid cube pass through metal right in front of the class's eyes; while Fergus demonstrates a Tardis, which restores a broken mug from the school staffroom and turns his tea-stained tie new again. For Trick of the Trade, kids will need two £1 coins, a 1p and a glass, and to be near a table with a tablecloth on it, to learn a trick to amaze their mates. Show less