Ice Balloon Lanterns: Fill balloons with water then freeze. When they're about frozen, snip the top of the balloon and peel away. Drain any excess water. It's important that one side of the balloon remains unfrozen/open, so you can place a candle inside.
Ski Slopes Diorama: An adventure in scale and spatial relationships. Choose a container, then put yourself in the shoes of one of its future inhabitants. This skiing diorama has been crafted in a ham tin.