Weights for a 15 year old

PSM1

My eldest is 15 in August, and wants us to get him some weights to use in the garage.

He is a very big and strong lad - 6'1 with a broad frame.  I think he will easily overtake my 6'3 in the next year or so.

I'm looking at various options for a weights bench and some dumbells and a weights bar.  But I really have no idea what is good as I've never used free weights much at all.

Really looking for suggestions on :
- Appropriate weights / equipment for a big and growing teenager
- A good place to source them

He isn't looking to get 'big', he just wants to have good definition and increase his strength.

PSM1

Why not pay for a gym subscription and a few sessions with a trainer?
At least then he will get good advice on how to train and will also not be training alone so less risk of injury etc. especially with a weights bar which he could be tempted to lift too much weight with when on his own.

reiteration

He can't join the proper gym till he is 16, so just looking for something to keep him going till then