We're going on a trip and I made this little felt game for the airplane. We use this on a larger scale every week at the Library's storytime, and the toddlers & preschoolers LOVE it. You hide the mouse secretly behind a house, then you say, "Little mouse, are you behind the orange house?" You keep going until you find the little mouse.
This particular set is small - slighly smaller than a sheet of regular computer paper. I made all the houses out of cut paper, laminated them, and then placed small velocro tabs on the back. The blue background is stiff craft felt and a pocket was attached to the back to store the pieces. I'm super excited to see Calvin's reaction to this! I predict he'll love it.