Had when i worked in a preschool and kids love them! I would use colored sand instead of white salt. DIY salt tray with alphabet cards. Easy to make and kids have fun smoothing out the salt after correctly making the letter
Girls like reworked, too! Classic Teepee from Henry's House. "The Classic Teepee is made from natural cotton calico for the main panels and features gorgeous cotton print fabrics for the doors and co-ordinating trims.