Feature: 1. Lung Capacity Exercise: Blowing ball breathing exerciser can increase lung capacity by exercising the respiratory muscles and increasing breathing stamina. 2. Educational: Let children understand gas in motion can keep light objects balanced, understand the charm of physics, and cultivate children's interests. 3. Widely Use: Breathing exercise tool includes 2 foam balls, small in size and light in weight, which is suitable for home play, school use, and outdoor use. 4. Bright Color: Lung capacity training tool adopted safe and environmental protection water paint color, and other parts are made of wood, not painted. 5. Safe To Use: Blowing ball lung exerciser adopted 360° safe smoothly polishing, with no burrs and will not scratch your hands, which is safe for you to use. Specification: Item Type: Blowing Ball Breathing Exerciser Material: Bamboo Wood, Foam Function: Cultivate interest, exercise lungs. Package List: 1 x Blowing Ball Tool2 x Foam Balls Note: Please do not use for children under 3 years old. Children should use under adult supervision.