Heathrow Airport Ice Cube Tray

Heathrow Airport Ice Cube Tray is made in the shape of the world's busiest airport. (which is currently totally snow and ice bound)

To use the tray, place some of the plastic model planes (that it comes with) in various positions on the layout; pour in the water, then freeze. Making the actual ice cubes is the fun part, as the entire layout must be bashed repeatedly with a hammer, or against the edge of a sink to fracture and release its contents.

This results in the creation of a number of icy fragments, some of which will contain the plastic planes frozen at chaotic angles into the irregular cubes and shards. These will slowly thaw and float to the top of any drinks in which they are placed.