I've been decluttering like mad lately and decided I needed to do something with the huge stack of paper bags and newspaper I had. I could have just recycled them, I suppose. But looking at the two stacks sitting beside each other, I came up with a brilliant plan - at least from Gray's point of view.
He helped me wad up newspaper sheets and stuff them in the bags. I taped the tops shut and then he had cheap, fast building blocks.
Fun to build with, fun to knock over, fun to jump on.
And fun to build with again and again.