A.G.
You could work at the zoo. I dont know if there is one in your area, but you could be one of the "tour guides" At the zoo here I always see older ( and by older I mean old enough to be retired) people leading groups of young kids and giving them animal facts and answering questions.
P.S. Im not saying that you are old, just that if seniors are out there doing it any of us could be doing the same as well