The Riddle

Tonight at dinner, John said "Wanna hear a riddle?" Daddy and I both said "Of course!" John says "What house has no doors and no windows and a star in the middle?" Daddy and I looked at each other. Both of us were clueless. Daddy said "John, I don't know." He said "An apple. Cause when you cut it in half it has a star in the middle." Daddy and I just stared at each other. And then Daddy said "But an apple isn't a house." John didn't miss a beat and said "It is for a worm!"