"Happy Days Are Here Again" is a 1929 song with music by Milton Ager and lyrics by Jack Yellen. It was originally published by Ager, Yellen, and Bornstein.

Now this tune is available for all of our standard 18 note music mechanism.

18 note hand crank music mechanism

18 note wind up music mechanism

18 note battery operated music mechanism

And can custom the wood box with engrave pattern  or paper box with your own pattern .

Also if you want the music mechanism apply to plush toys,you can choose our

pull string music mechanism .