Bits and Pieces - Clarabelle The Calf Motion Sensor - Garden and Outdoor Space Decoration Win the hearts of your neighbors and friends when you place this barnyard baby in your home or garden. Our adorable calf has a motion sensor that activates a mooing sound when someone is walking by. Realistically sculpted from durable polyresin with textured detail, and hand painted to replicate an actual calf. Suitable for indoor or outdoor use. Requires 2 AAA batteries, not included. 16" x 12-3/4" x 5-1/2".