We also took my mom for her first trip last year, aged 59, and coincidentally it was our dd's first trip too, at the age of 11 months. Growing up, we just couldn't afford family vacations, and my mom never imagined she would get to go. Dh & I took our first trip to disney back in 2000, in our very early 20's, and we had a blast. I couldn't wait to share it with her.
We had a really good time, and she was just in awe with everything. I have some great pictures and some great memories that I will always treasure, especially of her and my dd. My moms health is not the greatest, and I don't imagine that she will make it back, so it really was a special once in a lifetime experience for her.