DS (5 months) loves standing up supported for balance, but taking all his own weight. OFten he won't even let us sit him down on our knees, for example, but wants to stand. My MIL says he'll get bandy legs from doing this so young. Should I not let him do his 'standing' game? It does happen several times a day but not for more than 5 minutes at a time, at a guess.