Do not take Daddy's models out to the sandbox to play with.
Do not use Daddy's models for "target practice" by throwing the football at them.
Do not play "Demolition Derby" with Daddy's model cars.
Do not color Daddy's instruction sheets with crayons; do not paint Daddy's models with watercolors "to make them look pretty."
One more word, Stern0: You'll be absolutely amazed at how fast kids grow! One day he's in diapers, and the next thing you know, you're helping him choose a tuxedo for the senior high-school prom.