Please note: the colors of the building blocks are random,The product color in the picture is only for demonstration reference.Instructions not included. STEM activity kits,Diy toy,MOC EV3 Wedo Mindstorms can assemble freedom to create unique creative. Technic parts assortment pack 233 parts,same as picture Applied to the standard small particle parts, it can be compatible with the mainstream brands on the market, a great accessories set. Easily to be assembled and disassembled, simple to use. Finest quality meaterials, affordable and durable Fun and useful for your technic project, a great gift choice for building block fans. We have a variety of building block upgrade options: Over 600 lighting kits available in our store More than 50 power upgrade kits available in our store More than 20 kinds of spare parts sets, you can do STEM, EV3, MOC and other DIY, you can find tread,sprocket,wheel,large,link,chain,holes,and,reinforced,rim,tire,wedge,belt,pulley,bush ,axle,connector,perpendicular,pins,bent,friction,ridges,notched,pneumatic,liftarm,modified,frame,thick,gear,tooth,knob,cog,double,bevel,rack,and other spare parts, Finest quality meaterials, affordable and durable.