Its mini 3D pump set. you can purchase 3D kit for small square DC Motor mini size one mainly know as 130 no dc motor. It suitable for mini motor of 2 mm dia shaft size. Click on the video link. You get full details of how to make it or use it. 
Video Link - https://youtu.be/yVzCLBUz68M?si=wYLYrpnzOwaUbTV_
its 3V to 5v operated pump. you can use even 2 AA cell Also to operate the pump.
Package Include - 
motor +pump set