ITEM NAME:Wood Frog Rasp Percussion Musical Instrument Tone Block with Stick Supplies J7W3 HOT SALE body .shopclass { float: left; width: 100%;.The size is large enough to create a realistic ribbit-like, or croaking frog sound when played correctly. INSTRUCTIONS: Use the wood stick (included) to gently rake up the frogs back to create a high-pitch cricket chirp.