Check these out!
Honking Horn, Boxing Bell, Doorbell, and Boing! at ABC & Toy Zone or Trainer's Warehouse- (4 for about $20)
Lights and Sounds: Laser, Buzz, Charge!, and Siren at Trainer's Warehouse - (4 for about $25) These also light up!
Cow, Rooster, Horse, Dog at Trainer's Warehouse - (4 for about $20)
You can also get them all at Amazon.com for about the same prices.