I need ideas for Inexpensive Christmas shopping for Nieces and Nephews

My husband and I have 15 nieces and nephews ranging in ages from 1 to 15 yrs old. Although I know I shouldn’t feel pressured, all of their parents have always gotten nice gifts for our kids and it would feel wrong for us to show up with nothing. However, we have three children ourselves and we need to shop smart. Does anyone have any frugal kid gift ideas? I’d like to keep it around 15dollars per child.