Something I noticed in my town that doesn't get much attention paid to it anymore is the local Hobby Shop.
Well...it's always kite flying season, so for today's stuck-at-home date idea, how about making kites together? Then take them out tomorrow with the kids or grand-kids and fly them. They also make awesome gifts. All the supplies should be available at your local hobby shop.
If kites don't suit your fancy, check out some of the other cheap and cool things they have there and build something fun together. You're not just building a craft project, you're building memories that will last an eternity.