3D printing pens; three-dimensional printers; electric plastic extrusion instruments for creating objects via melting, cooling, solidifying and extruding plastic; electric extrusion instruments for creating objects via melting, cooling, solidifying and extruding edible substances; holders and stands for three-dimensional printers and 3D printing pens; specially fitted platforms for three-dimensional printers; fans, unblocking rods, wrenches, and warming wands for creating objects via warming of plastic materials, sold as an integral component of 3D printing pens; soldering hobby craft kits comprised primarily of 3D printing pens and electric soldering irons; hobby craft robotics activity kits comprised of 3D printing pens and robotic parts to be assembled with the 3D printing pen; non-adhesive gridded plastic platform specially fitted for use with 3D printers and 3D pens for constructing 3D objects; machinery; machines for processing plastics; plastic molding machines; hand-held printing pens for use with melted plastics; electric welding apparatus; thermal welding gun

Plastic filaments for use in 3D printing, including, plastic in the form of filaments for further manufacture using three-dimensional printers; materials used to create three-dimensional designs and objects, including, semi-worked thermoplastic filaments used for 3D printing; industrial 3D printing kits comprising molds and stencils to be used in connection with modeling compounds used for 3D printing; semi-processed plastic in the form of films, sheets, tubes, bars, rods, ribbons, strips and pellets for creating three-dimensional artwork, toys and playthings, scale model buildings and items in the nature of functional items and design items; plastics in extruded form used to make three-dimensional artwork; extruded plastic in the form of feedstock, sheets, rods, pellets, and sticks used to make three-dimensional artwork; holders for three-dimensional printers