Gift idea for MIL who helped out

I recently had surgery and my mother in law has really helped us by traveling down and staying with us for a week to take care of our 10 week old while I was in the hospital and my husband had to work. I really didn't have anyone on my side of the family who would've helped. She has been a blessing. So before she leaves soon, we'd like to get her a nice gift or do something special for her. Does anyone have any ideas? Thanks!