The 9 Turtle friends all want to fit into the water, represented by the frame. Can you help them do it? Its a significant challenge! This is a beautiful and unique puzzle. There are at least 4 different hardwoods used to make the Turtles and may include maple, oak, cherry, alder, walnut, teak, and others. Wood is 1/4" thick so the turtles are quite strong and durable.