Dubbed "Mowercycle," this gift idea for him will be received with far less enthusiasm than... well... a motorcyle, bike, or actual lawnmower. Even though it combines these things, it does so in such an awful way.
The greenhouse in the country: do with their hands out of PVC pipe. Detailed instructions with diagrams for the greenhouse of plastic pipes. Two variants of the greenhouse: one entirely of PVC pipe, the other of the pipes on a wooden frame.