history: When I was a young child, my grandmother took care of me while my mom worked. That was so, nice I need to send her something. When I was much younger_comma_ my grandmother took care of me while my mom worked. I need to send her something. Sounds like a great lady.  I am glad you are appreciative of her 
current: Absolutely, I get busy at times but I think it's important to remember the people who got me here.
next: Yes it is.  You should take her out to dinner or something to say thank you.