Wagumi wooden 3D puzzles series features architecture landmarks, animals, dinosaurs and other Japanese cultural objects and scenes. - Architecture Series : Wooden 3D puzzle kit featuring castles and buildings in Japan. Crystal puzzles, Japanese puzzle box for adults and 3D Puzzles have been very popular gifts for adults and kids alike. - Easy Assembly : The puzzle box includes wood sheets with precisely laser cut pieces designed to connect and build without any glue, making it easy to assemble for any craft and puzzle hobbyist. - Wooden Puzzle for Adults : Unlike paper or cardboard castle kits, wooden pieces are sturdy and its size varies from nano to large - making the miniature models as detailed as ship in a bottle kits - Fun at Home : Great DIY project for seniors, adults and kids staying at home - making it a good excuse to stay away from smart phones and video games. Doable for kids ages 12-14 with some assistance. Assembled size (estimate) : 8.3" x 5.8" x 6.8"