1. Folding ‘leather’ seats
Fiddling ones to build, these, thanks to the amount of curiously ribbed brown pieces that need slotting betwixt the beige piping. The end result is a classic piece of abstract Lego thinking, turning hard plastic bricks into something that looks comfy enough to lounge in. And thanks to hidden hinges underneath, they even tip forward, for rear seat access. Hours of fun. Who needs an Xbox?