My son pulls off some cool experiments all on his own (I stay out of it apart from the phone call consultation, or YouTube video call) with salvage and other workarounds, with the money he earns and my contributions.
These brothers have a freakin' mini-Tony-Stark lab in their house! Good for them and their parents. I like to see money spent this way rather than traveling team sports and uniforms. My take is sciency types, aka nerds, indulge more in solitary sports - rock climbing, skating, biking if they have time away from building a frigging nuclear fusion reactor in the bedroom!