These 9-month old twins find their older sister's dancing and prancing to music hysterically entertaining.

Unlike the two-year-old who went ballistic when she had a new sister, this older sister thoroughly enjoys performing for her twin siblings.

I'm not sure if this is a one person musical chairs - minus the chair - or a one person Ring Around the Rosy game. An interesting side note. Ring Around the Rosy was originally called Ring a Ring o' Roses and likely dates back to the late 1700s.

Within a few months the twins will be walking, so big sister will have even more fun teaching and sharing with the twins all the fun you can have on two feet, especially falling down and laughing about it.