This is the Mould King 13181 Plotter: a building blocks set that comes with everything your kids need to build their own drawing robot with app control. It has 4 modes for users to choose from, including freeform drawing and writing modes. This set has 3088 pieces. It can handle pencils, marking pens, and everything in between.
This plotter robot runs on a rechargeable Lithium-ion battery. It ships with an instruction manual for easy assembly.