Gift idea for my parents who babysat my son

I went back to work for 2 weeks straight as my work needed me. It was the first time I worked since giving birth to my 19 month old.

I really want to buy a gift for my parents because they minded my son while I was at work. Just as a way of saying thank you I’d like to purchase them a nice gift with my first pay check. Any ideas? Nothing outdoorsy cause they’re not really into that. Thanks in advance!