Material: MetalSteam Locomotive Product size: 11.4cm*3.2cmAbility: vision， hands and brain， grasping， sensory， hand eye coordination， and other abilities， interactive toys， parent-child communication， the cultivation of interestImportant note: 3D metal model is very precise， depending on the complexity of the model， the metal assembly work takes 30 minutes to several hours to complete， so when in assembly， please do not impatient， be patient Oh， small parts must be used pliers to clamp down one by one， can not be directly used the hand to break， otherwise easily lead to operation broken parts.