Just spoke my gf. She's doing grad research on children's play and is actually (partially) funded by Lego. I'll just quote her (but bear in mind that it's a s

Just spoke my gf. She's doing grad research on children's play and is actually (partially) funded by Lego. I'll just quote her (but bear in mind that it's a soundbite - there's likely a whole PhD in boy/girl play behaviour). "Generally speaking, boys will happily construct just for the sake of it and although girls will also build things, for them there's no point if they can't breath life into it."