Features 1、Smoothly edges without burrs, good and fine texture, having exquisite workmanship. 2、Wood color, bringing endless fun for you, suitable for playing, effectively help you pass the time. 3、Delicate design, with steel balls and winding maze lines, training your balances. 4、Controlled by 2pcs twisting control knob, fully exercise the coordination, hand eye cooperation. 5、Quality wood material is light and long lasting, wood material and good hand feelings. Specification Item Type: Wooden Maze Puzzle Material: Wood Size: Approx. 16 x 16 x 5.3cm / 6.3 x 6.3 x 2.1in Functions: Left and right brain development, balances training, improving observation and concentration ability Usage: Turn the control knobs on both sides to control the balances of the two inner layers, so as to make the steel ball roll along, avoid falling into the trap, until the end (the steel ball is only 0.95cm / 0.4in in size, children should play under the supervision of their parents) Package List 1 x Wooden Maze Puzzle 2 x Ball