› We Wish You A Merry Christmas

http://supersimplelearning.com/songs/themes-series/christmas/we-wish-you-a-merry-christmas/
The traditional "We Wish You A Merry Christmas" is wonderful for young learners because the melody is so simple and repetitive.
Try different actions! For example, “We all do a little dancing/hopping/wiggling/etc.” You can also make it a birthday song! “We wish you a Happy Birthday. We wish you a Happy Birthday. We wish you a Happy Birthday. Happy Birthday to you!”