This item is a set of human lung breathing model, for kids or students to learn the principle of human lung breathing. This set of model can keep kids entertaining and studying for fun and leaning. DIY gift and toy for kids. Features -Color:Random Color-Material:Plastic- Size: 18.50X5.50X5.50cm/7.27X2.16X2.16in -This is a perfect teaching tool which will let the student learn the principle of human lung breathing.-Assemble the lung breathing model by yourself, train kid's manual assembly ability.-This lung breathing organ model is easy to assemble, suitable for kids to DIY by themselves or with parent.-Good as educational toy, which can help your children recognize their body construction.-Increase knowledge and develop students brains, and makes your children fall in love with hands-on.Packing list: 1 x set of lung breathing model