Kangling
(Human Femur Trumpet)

Jingle bells, jingle bells (okay, got the song stuck in your head now?!) - you get the idea! Just about any inexpensive (think cheap) set of bells connected together will produce the desired effect - the above pictured ones are no exception. Just that same, the sound they produce is instantly recognizable. While most folks simple shake the you-know-what out of these, ad nauseam, it is often recommended to hold the bells in one hand and then tap the top of that hand with your other fist. This provides considerably more control over the instrument and won't drive everyone nuts! :)