Questions from a four year old

"Sonya, when you turn 99 years old, how old will I be?"

"Mommy, what would we do if you had a baby?" [shortly followed by]  "What if we had ten cats?"

"Daddy, what would be do if we had three cars?"

"What's inside an apple?"

"What if you don't have bones?"

"Why are bones hard?"

"Do I have to go to school every day? Why?"