To be buying presents for yourself from the kids still.
Niece is 14, Nephews are 13 and 16.
Eldest has a part time job and all three of them get pocket money that they earn by doing various chores in the house.
My sister and her husband bought their own presents from the kids (the kids had a budget and chose the gifts but their parents paid)
AIBU to think they are old enough to buy gifts themselves with their own money? Especially the oldest.