Please read product description carefully before purchasing.
How it works
Accessories included: Motor, Battery holder (Adapter in option), electrical wires, steel shafts, marbles, cog & Screws, brass barriers (U shaped), switch, instructions (pdf file) and everything you need to build this machines. Not includes Glue and batteries.
Modules: independent, interchangeable, such that each contains everything necessary to execute the desired functionality. Please choose modules from the modules collection, they are numbered from 1 to 9.