I let the kids do it.
I realize that many of my cardboard crafts here on this blog are somewhat involved and 3-D, which makes them funner than usual for the girls, but they are sometimes more of a time commitment than we'd like.
For lazy days, we have our Flat Cardboard Crafts, the sort that don't require the glue gun, or the smelly-fumed craft adhesive. And as the main point of such Flat Projects is decorating, even Kate can do it without me having to watch her too much.
Yesterday we made cardboard cookies. So easy it's ridiculous.
First we cut out cardboard circles from an old amazon.com box (but you can use any box!)
Then we decorated them with various craft supplies - buttons and self-adhesive foam sheets cut into frosting shapes, circles and sprinkles. And markers. And a little bottle of white puffy paint for extra frosting.
And the kids made their cookies -
and today the puffy paint frosting is all dry, so they can play bakery (and I can work on halloween costumes).