Fourteen teams of school children descended on London's Connaught Rooms this week to take part in the K'nex challenge, sponsored by NCE and construction toy manufacturer Hasbro. Teams of two had one and a half hours to build a K'nex crane capable of moving 500mm forward, picking up a 250mm high tree and relocating it without falling over. Extra points were awarded for self propelled models. The winning team of Glyn Furnival and Lawrence Engledow of Stithians County Primary School, Truro, won £1,000 of computer equipment for their school. Runners up Owen Patten and Matthew Price won £500 of computer equipment for Monkton Fairleigh Primary School, Bradford-on-Avon, where they are pupils. The event was organised by engineering promotional body Young Engineers which comprises 1,500 children's engineering clubs.