1:48 Scale Money Boxes

I got these two kits from Petite Properties on Monday, and started to assemble them that same night. I've since painted the interiors (black) and the door and window frames in antique white.

These two buildings are actually money boxes! I'm going to make them up to use as money boxes, but I want to cover up the doors and windows so you can't see the coins inside, and also to keep the dust out.

They are in 1:48 scale. They're called Pennypinchers Cottage and Miniature Savings Bank.