To grandparents for DC? My MIL is awful for buying absolute tut that always ends up at the charity shop, think sale clothes that no one buys 2x larger than the child, toys for the wrong age group, bedding in a character they like but for the wrong size bed, or summer shoes that will fit in winter! (She gets it all in the sale or cheap websites)
FIL usually gives cash unless MIL tells him what to get which she also does to BIL
Last year they turned up with a huge bag of stuff that all ended up at the charity shop, for DD's birthday they bought her a present she already had and didn't understand why her face didn't light up when she opened it but they never bother to ask what she wants 
I asked DH to send a suggestion but he never does, I'm sick of MIL asking if iv put DS in an outfit shes bought or shoes etc when iv not even kept them!