3D DIY London Bridge model metallic nano puzzle A developmental DIY puzzle game for children over the age of 14 Assemble miniature 3D models from laser cut metal sheets Can be an exquisite decoration in your house Inspire the children's imagination Improve kid operation ability Improve children's knowledge Develop children's creation ability Size: 119 x 119 x 1 mm / 4.69 x 4.69 x 0.04 inch Net Weight: 27 g / 0.95 oz Color: Silver What is 3D Metal Puzzle: CLICK HERE