Here is a wonderful guide for you. http://www.animal-link.org/riding.shtml
I learned to ride at Shannon Stables in Bedford Years ago, but that is not on the list - you may want to give them a call 234-9002. My daughter took lessons at Zephyr Farms in Mahopac, which is on the list. JT Farms is beautiful on Rt 35 in South Salem. There is another one in North Salem not on the list - if I think of it/drive by I will get back to you. There is one on the list that sounds very child friendly - offering parties and the like!
So, enjoy your experience - if you need me for anything else please give me a call or enjoy my website www.KarenFromKatonah.com which has a grerat deal of local information plus tons of photos! Also for Real Estate, please think of me as well!
All the Best,
Karen from Katonah