Knock knock.
Who's there?
Donut.
Knock knock.
Who's there?
Donut.
What do you call a train that carries bubblegum?
Chew-chew train! Hee hee!
Ever heard of candies? Candies balls fit in your mouth.
I need to call candy. What's candy? Candy can "bofe" if these balls fit in your mouth.
Who make hard candy for the kids?
Solve.