Building Blocks Toy is an online store specializing in LEGO-compatible building bricks and construction sets for builders of different ages and interests. Its catalog spans play sets for young children, educational and STEM-focused products, family activities, and detailed models for adult builders and collectors. Shoppers can explore vehicle collections featuring cars, racing models, motorcycles, trucks, construction equipment, emergency vehicles, and military designs, as well as aircraft, ships, and spacecraft. The store also offers architectural sets inspired by castles, historic landmarks, Japanese and Chinese buildings, city skylines, houses, and imaginative worlds.

Other product categories include remote-control builds, mechanical engineering sets, display models, anime and pop-culture themes, animals, dinosaurs, seasonal designs, marble runs, puzzles, and digital or light-up blocks. Building styles range from Technic-style and magnetic pieces to wooden, foam, micro, mini, and oversized blocks. The store highlights brands including Mould King and CADA BRICKS®, alongside building blocks and compatible sets. Its website advertises free global express delivery with an estimated shipping time of three to seven days, and provides product browsing by age, theme, and building style.