I am making gingerbread houses with mine, 6 kids, all aged 4-9. it will be so much fun. We did it last year but only 3 were here, and they loved it. You can buy the kits, to make it easier cause there is no baking
If that sounds like too much just make gingerbread men, you can bake them yourself, and the decorating would be fun for them, and then everyone gets to eat!