Competition- challenge your friends.Test yourself or compete with a friend to see who can make the tallest tower or the most amazing or finish the fastest. Makes A Great Desk Accessory - Play at work to refresh and energize your mind or just to waste time. Manufacturered by MKLEKYY. Increasing Difficulty - By adding additional sets you can increase the challenge complexity and height of your towers. Customer Service: If there are problems with the purchase do not hesitate to contact us we will help you to solve the problem within 24 hours. With a 100% customer satisfaction guarantee. Funny - More than just a stacking game. It's a balancing act and an art project that's challenging and fun.