Features:<br> ●The puzzles look simple,but contain lots of mysteries. They are easy to disassemble but difficult to assemble.<br> ●Train brains.It can make your brain sharper, develop intelligence, Challenge your mind and patience.<br> ●Have parties.Take this set of brain teaser to share with your friends, families or colleagues.<br> ●These puzzles can get children away from phones or other electric device.<br> Package Include: <br> 16 x Metal Puzzle <br> 4 x Wooden 3D Puzzle <br> <b>Cautions:</b><br> 1.Children must be used it under the adult's tutelage.<br> 2.Do not drop them on the floor or the desk.<br> 3.Do not play with them if there is any issue.<br> 4.Do not keep the toy in the mouth to prevent children devour small parts in the toy.<br>