I've been brainstorming some ideas for things we can do that are very low cost/free as a family (but most of these would also work as a date night idea!).
Bake something, go for a hike/walk somewhere other than the neighborhood, cook a meal, movie night at home with popcorn, crafts (painting, coloring, etc), puzzles and charcuterie board, go to the shelter and borrow a dog for the day (we go for a walk and then get a pup cup!), volunteer somewhere. I'm sure there's more there, but that's what I came up with for right now.