In the mini-bots room (straight ahead when the worlds appear), there is a claw game that uses coins won from other games to grab prizes. One of these prizes is a green helicopter. Once you have collected it, lean in and look at it. It should fly into the air. Position yourself under it and blow; the microphone should register and cause the helicopter to fly up. Continue to blow at the mic to keep the helicopter in the air until the trophy unlocks.