Arthur is trying to build a castle, but it keeps falling down. Too wobbly! a frustrated Arthur says. Then Arthur catches something in the moat at the playground, and it's too big and scary for Arthur to handle by himself. Luckily, Daddy is there to help! The perfect book for days when only Daddy will do!Arthur is trying to build a castle, but it keeps falling down. Too wobbly! a frustrated Arthur says. Then Arthur catches something in the moat at the playground, and it's too big and scary for Arthur to handle by himself. Luckily, Daddy is there to help! The perfect book for days when only Daddy will do!