From Zumba.com:
"When it comes to body sculpting, Zumba® Toning raises the bar (or rather, the toning stick). Learn how to use lightweight, maraca-like Toning Sticks to enhance rhythm and tone all the target zones, including arms, abs and thighs. Zumba® Toning is the perfect way to sculpt your body naturally while having a total blast."
See this video for a glimpse of Zumba® Toning.
Toning moves are also called body sculpting. The format is Zumba® songs to warm up then the toning sticks are added for the special toning routines.
We recommend using the sanded Zumba® Toning Sticks (1 1/2 lb. and 2 1/2 lbs) rather than your own weights since they do make a sound and are designed for our choreography.
The weights are optional since the moves are doable without.