The Pediatric Voldyne Volumetric Exerciser 2500 mL is a respiratory device designed for use with children. It increases the child’s lung capacity through voluntary pulmonary exercise. Featuring a compact ergonomic design, pediatric sized mouthpiece, and child oriented labeling. This device was designed specifically for kids and has a kid friendly design and coloring to ensure compliance. It also comes available with a coloring book and puzzle for your kid's added enjoyment.