E.T.
My sister-in-law recently had her daughter's 3 year b'day party with all ages of kids there. She ordered zoo animal mask kits from oriental trading for all of the kids to make. They were just foam cut outs and you stuck the other pieces on with double sided tape. They have all different kinds of masks sets and most of them are less than $5 for 12 masks. It was just something a little different and all of the kids loved it.