For 14-year-old or above Sturdy, not easy to break apart. Building manual included This product has >610 pieces. Special Interlocking Brick-through System JEKCA is “building blocks for adults” designed by Hong Kong-based toy-brick-maker. The products provide a fabulous range of 3D animal installation kits for teens and adults. JEKCA is different from the traditional toy bricks you have ever played with. We have a patent locking technology to ensure these brick sculptures can be built sturdily WITHOUT any glue. The assembling procedure is straightforward and a detailed step by step manual is included in the package. JEKCA works great as a family project! Enjoy the leisure with the family and feel the accomplishment of building these wonderful sculptures together!