Early morning tai-chi and muffins

Sometimes baby Chuck Norris likes to do early morning tai-chi.  Today I woke up to his shuffling hands and feet and couldn't fall back sleep.  Since I was already up, I decided to bake some strawberry and banana muffins.  

Does anyone know how to get a muffin top?

They ended up being tasty and moist, but the strawberries took on a strange fleshy texture (yuck).  Next time I'll try using blueberries instead.