Tyred Jr the elder and I recently completed his first 26″ wheel build, comprised of frame, fork, wheels and a couple of other bits off here, some new bits and a couple of spares bin odds and ends.
We took our time to get the bits we wanted and tried to keep weight and cost as low as we could. Once we gathered it all together, he built it with me supervising. I tightened the tight bits, indexed the gears and fine-tuned the brakes, but other than that he built it up by himself, hopefully learning loads on the way.
He now has a sweet little bike weighing a smidge over 10kg, which cost me somewhere between 5 and 600 quid.
The wee daftie then went and wrecked a brake lever crashing in a race last Saturday.
Highly recommend this approach, loved doing it with him and he’ll hopefully value the bike a bit more than one that came out of a box.
^ agree with what bol says about 26″ bargains, plenty out there just now.