They are all made of durable ABS plastic materials, which are non-toxic, BPA-free and odor-free. 【SAFE AND DURABLE KIDS DOCTOR KIT】These tools are designed for little hands and easy to grasp. There are no sharp objects or edges of these tools, so you don’t have to worry about kids hurting themselves while they play 【REALISTIC SOUND AND LIGHT EFFECTS】When kids press the electronic stethoscope, they can hear the heartbeat sound; the pretend play blood pressure cuff can be worn on kids’ wrist, the air valve ball is squeezable and the indicator of gauge will rotate when child press it; the thermometer, otoscope, flashlinght and dental mirror can all emit light when working, which can give children a more real experience while playing.