"Tryin' to ride on that tiny My Little Pony scooter?"
"You're too big, buddy!"
He didn't believe me. He still kept trying to ride in that little thing. I had to get his real scooter to show him the difference. Luckily, with his short attention span, he soon forgot about the Pony scooter and hopped on his Scuttlebug, and zoomed off.... :o)