Granted, I understand that the purpose of a project like this isn't just in the end result. Depends what crafts you want to practice and what's just necessary work around them. There's still quite a bit of fun project left in converting an existing mower to electric and refinishing it to look more like a classic tractor.
I'd rather have my kid ingrained with the idea that electricity is the future even if it's an amazing achievement to be able to tame explosions to move around