For my daughters birthday I bought her a swing set and slide, due to the weight limit it means only my daughter and son can use it and the eldest can’t, according to my mum that is unfair and I should only buy things all the children can use and it’s a “waste of money” yet it was a birthday present for dd so never intended to be a sharing present, does everyone else only buy things that all kids can use? Which is hard to do when there is 6 years between the oldest and youngest