Adjustable Dumbbell: Fun, adjustable and colorful dumbbell set, suitable for children!<br> : The perfect way to exercise child slowly. Both children and adults can use it. Add this to your kid's family gym!<br> Fill Sand/Water: Can be filled with sand or water to increase weight.<br> Improve Motor Skills: Dumbbells are perfect for kids to increase their strength and improve their motor skills.<br> Colour:Gray+green+pink+blue+red<br> Material:plastic<br> Size:Stick: 36cm<br> Stick diameter: 3cm<br> disc: 400ml,250ml,150ml<br> Package Contents:<br> 1 x Gray stick<br> 2 x Green disc<br> 2 x Pink disc<br> 2 x Blue disc<br> 2 x Red screw buckle<br> Only the above package content, other products are not included.<br> Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.