These 3D puzzle model kits are great for kids and teens to have fun building. The Eiffel Tower is 21 inches long, 8 inches wide and 8 inches high when completed, while the house is 7 inches long, 8.25 inches wide and 7.5 inches high. They are made of high - quality laser - cut wood pieces. The step - by - step instructions make it easy to start building. They can be used for a solo challenge or as a gift for any occasion.