I have some downtime and I need a few ideas for goody bag fillers for my son's birthday party this year. The trend in my circle is to do a bag with a few items, but no candy or homemade food items.

I was thinking of doing stuff that my son likes, especially since he just got a gift bag and he's basically obsessed with it.

The theme might be "3" but I am open to others.

Home made play dough with a personalized laminated name mat (just outlines of the kids names, laminated, they can roll the dough out to form the letters)
Home made bath crayons in the shape of number 3
A sheet or two of number stickers
Something else, maybe a number matching game, with felt numbers?

Any other ideas?