This w/e Curly (age 6 and 11/12) and I had a ridiculous amount of fun with atl-atls's. I'd made one previously, and a simple dart (bamboo with the plastic from a milk carton as the fletchings) and we took the dog for a walk and threw as we went. Even with very basic kit, Curly managed accurate shots of ~30 metres, and I managed several accurate (within 0.5m of a target spot) of ~50 metres. Today (Sunday) we each made our own (2nd gen) atl-atl's. Curly managed very well with a small plane, hand drill and crook knife to make his very own weapon. Having just got 'Primitive skills 1 & 2' books through the post yesterday, we made the new models a lot more technical, with hand straps etc. and multi-part darts. Hope to get some suitable stones off the beach this Easter to act as bannerstones. Will try to get some pictures of the 'Palaeo Boys' in action.