Elevator lift

#1

hi
I see lift elevator kit like this one https://www.banggood.com/DIY-Lift-Elevator-Kit-NO_148-Science-Educational-Develop-Toy-For-Children-reviews-p1064013.html.
that work with a servo motor but you also can do it with a stepper motor few thing to change.
More over it easy to control it with all your card I think and
that can be really fun to add that to any construction
you con see this instructable he use a scissor with makeblock product https://www.instructables.com/id/How-to-Make-a-Scissor-type-Extension-Arm/