One thing you can't pretend to be is funny.
You can teach an old dog new tricks with the right kind of doggie treats.
If you want to see a shooting star, you might have to spend a lot of nights looking up.
If you wait until you're really sure, you'll never take off the training wheels.
If you want pancakes for breakfast, offer to help make them.
If you want to zoom down the expert slope tomorrow, you have to fall down the bunny slope today.