Great looking bird house. I bet he liked it, the birds will like it even more.
For moles. I whittle a whirl-gig that consists of a propeller mounted loosely on the front of stick 1x1 about a foot long. Put a rudder on it, metal coffee can lids worked great, but you just can't get them any more. I mount this on top of a stake, Loosely so it can turn with the direction of the wind, and stick the stake in the ground. When there is a breeze the prop turns the whole thing rattles somewhat. Does not kill moles but it drives them away. I have a couple of these in my garden, they have been there twirling away for years. No Moles. Fun to make, fun to watch and they work.