The 198PCS DIY Technical Parts Gear Building Blocks Set is a creative and educational building kit designed for ages 6 and up. This set includes 198 pieces of thick building blocks and gear parts, allowing users to create a variety of mechanical structures and projects. The pieces are compatible with other assembly block toys, providing flexibility for extended building possibilities. Packaged safely in a PP bag with bubble wrap, this set promotes problem-solving and fine motor skills while offering hours of fun. Please note, the colors of the blocks may vary depending on availability.