The bricks are very tiny, please look over the images before order. We suggest you hold the pieces with a tweezer (not included). Install layer by layer, follow the instructions to find the point where each layer fits. The instructions maybe a little complex, please be patient and you will enjoy it. Once the first few layers have been completed it gets a lot easier. Micro assembled toy bricks made of plastic. Instructions included. One set with 1258 pieces. Also it's a leisure game for adults, funny and reduce pressure. Good for display, great for one who love building blocks. The product meets the criteria and is suitable for children over 3 years. However, according to the customer suggestions, we recommended for 14+. The bricks are Very Tiny, please look over the images before order. We suggest you hold the pieces with a tweezer (not included) .