N.D.
Hi there-
This is a hard balance as you don't want people to think you aren't grateful and/or that you don't want their gifts. My suggestion is to offer the idea of Savings Bonds, savings accounts for college, gift cards to local park districts, etc. I am planning to implement this myself this year so I don't know how well it will go over but I would love to take my child to more classes like swim lessons, sports, etc. but it's not at the top of the priority list. If someone were to pay for the classes, then that might give me the initiative to make it happen plus it doesn't take up space in my house.
Let me know if you decide to implement this and how well it is received. I think it's a fantastic idea and they could even combine it with one toy and/or a book so they can feel like they are giving something.
Good luck!