Then at the age of 1 ½ he watch me for 2 minutes looking through a glass door and at a distance of 25 feet, change out the spark plug and complete a quick tuneup of a lawn mower. Then when he came outside and he proceeded to do exactly what I had done to the lawn

Watch him! He'll probably pull the lawn mower's "head" next and attempt to "mill" it on the garage floor to increase the compression ratio!:-)

What does he charge to mow a lawn?