It comes with two mallets and can be played by one or two children at a time. Other great features include anodized aluminum bars, stainless steel hardware, and tamper-resistant screws. Choose from a steel or recycled post in portable, surface, and in-ground mounting options. It measures 31 13/16Ã¢ÂÂ wide and is available in a variety of heights for children of all ages. The recommended post length is 36Ã¢ÂÂ for in-ground mount and 34Ã¢ÂÂ for surface mount. Our sizing guide is as follows: 20Ã¢ÂÂ for children ages 3-5 years old, 25Ã¢ÂÂ for 5-7 year olds, and 30Ã¢ÂÂ for children 7-12 years old.