Charlie and the Tooth Fairy by Hilary McKay
Charlie has four wobbly teeth. He can hardly wait to put them under his pillow for the tooth fairy. If only there was a way to make them fall out faster. This is the seventh book in this hilarious series, which also includes: "Charlie and the Cat Flap", "Charlie and the Great Escape", "Charlie and the Big Snow", "Charlie and the Rocket Boy", "Charlie and the Cheese and Onion Crisps" and "Charlie and the Haunted Tent".