DH and I are celebrating our anniversary on Saturday! My mom offered to babysit for us for the day, and even said she would keep the girls overnight. We are on a pretty limited budget ($100 or less), but want to make the day fun and enjoyable too. I thought of maybe going out for a reasonably priced dinner, maybe a drink or two...but not sure that will last the entire day, I don't want to end up bored by 7:00pm

What did you do for your last anniversary? Bonus if it was budget friendly!