Duct tape. Honestly the only way he will keep socks on is if I put shoes on him too. Since he started taking steps a few months ago I put shoes on him to go to school everyday anyway though. Now he's learning how to undo the velcro.
My big boy is bounding towards 4! Baby brother coming in October!
Re: Do they make baby-proof baby socks?
I remember seeing some kind of elastic foot straps that fit over the heel...I will google.