So after an age of looking at kids bikes and not liking any, or the prices... I found a nukeproof cub scout frame for £100. its a cool thing. Total spend got a little out of hand but had some fun building it and the wheels. Had a random bonus at work so...
Rockshox 130mm Recon RL (waay overkill but meh they were cheap, run a good amount of sag)
Dartmoor raptor 30mm rims on DT clones 142*12. Maxxis minions tubeless.
9 speed 11-42 proper clutch rear mech. 28t up front on 150mm cranks (24mm shimano type steel splined axle). Gives an equivalent of my 32/50T 29er.
Clarks 4pot brake clones (really really nice and dirt cheap)
Its completely daft and Griff can't ride it the way it should be, but he needs all the help he can get at the moment, so I went for it. It needs some finishing off - pedals and some lower bars for sure, some crank/chainline adjustment but its pretty mega.