My 9 year old decided that she wants to be a Lego for Halloween. I'm sitting here trying to figure out how to make a Lego costume since I know they don't sell them, and if they do it would be like a bajillion dollars for a few hours

lego is such an awesome idea! what a cool kid.

maybe you could sew 6 circular cushions to the back of an overall-type-thing? two on the shoulders, two on the lower back, two on the backs of the legs? i'm not much of a seamstress.......so no idea how feasible this would be.

Alexandrina, check out this idea from Family Fun.