I've no idea whether this was purely marketing by K'nex, or whether the primary school paid for it, but either way ds1 (yr5) had a fantastic time today.
A lady came in and brought 12 large boxes of K'nex - one for each table (two classes), and they had all afternoon to create fairground rides/attractions working in pairs. DS1 had a brilliant time and came home buzzing about it. His pair won the competition for his class, and they will each get a small K'nex kit to bring home. But they will also be getting a huge box of K'nex for the yeargroup to use during wet playtimes