Idid the same for our last GD ,they also bought things under the budget.I asked them if they would like a newborn shoot with an ward winning baby photographer to use the rest and have something to keep .They did and have some lovely pictures of baby all taken when she was days old .
I remember going pram shopping (having offered to buy said pram) and DD and SIL having different preferences. In the end I gave money enough to pay for the more expensive option and left it to them to choose what they wanted. As usual, SIL got his way!!!