This little toy is a lot of fun. It is really hard! It's definitely a great toy for an adult or older child. I got this for my husband and he still hasn't figured it out, but he loves trying. It's a simple enough concept the cube breaks down into a snake-like figure that you have to reassemble. Despite being a simple concept it is fairly difficult to get back together. I'm really glad that I got this for my husband. It's a nice nonelectrical toy to pass the time for him. He has something to really got his mind off of life. I would recommend this to anyone.