Following the tree house theme... I stumbled upon this radio series on bbc the other day. It's about a fellow who's a professional tree climber and tree house builder. This series follows his progress having been commissioned to build a treehouse in an African rainforest for a wildlife film crew who will be filming monkeys up there. Shame I just realised that the first episode has gone, but to fill you in: he finds the perfect tree, climbs it to suss it out, then gets attacked by a swarm of bees and gets stung on his face while having to climb down.. so he has to find another tree, obviously.
Its called James and the Giant Tree House