Parent Gift

What is everyone doing for the parent gift...

I am already getting albums but do I still need to give them something the day of the wedding?

I really don't have any money and I'm not sure why the parents get a gift...

My parents are divorced, but are jointly paying for the wedding, and FIL's are paying for our honeymoon. The gift is supposed to be a 'thank-you' either for the wedding, or for just being there as your support system in life.

I think I'm going to take my mom and FMIL for a spa day, and I'm trying to take FH into taking our fathers for a golf day.