Lego is ace HOWEVER recently all the kits are pre formed, make one thing and can't make anything else. This is rubbish and sapping imagination from kids.
When I was wee you get lego and you could make a few models out of one set and all the bits were fairly standard.
I have piles of lego at Mums house, some of it was hers so it lasts! My Niece likes to play lego with me and sometimes my Dad as we are Engineers and have imagination!