I would put it in Em's bank... or at least tell the g'parents that - and say you will put it towards something really good for him later on. Say that he got inundated with presents - and he doesn't need anything right now.

And as Christine says... if you want/need to spend it - then go for it.

If I get any money for Shaun - I think I'll put it in his bank account. Then I can buy him better presents at Xmas or something - putting their money towards it