Shake things up! Add some oomph to your workout (and some spice to your soundtrack) with the 1 lb. (0.45 kilos) Zumba® Toning Sticks. These maraca-like toning sticks are not your average dumbbells! Filled with sand, they allow more “give” than traditional hand weights and let you shake, rattle and rock your way to sexy, leaner muscles and a more sculpted shape.