Whats the best anniversary gift you've gotten/given?

Its my parents 28th wedding anniversary & Im stuck for gift ideas this year. We usually do dinner but I want to be different this year.
Any great ideas?? ($100 or under)

If you have time you can make a scrapbook for them. Get a hold of their adddress book and send everyone of their friends and family stationary asking them to write down their favorite memory of the two of them.
Then secretly steal your parents photo albums and choose some pics to get scanned or copied and disperse them throughout the book along with people's written sentiments. It's not an elaborate scrapbook. You could arrange it in chronological order so it can be a 'Journey through the Years'.

I did this for my Dad's 60th birthday and he loved it. He loved recalling people's stories.

If you are really broke, you can offer to help them with a big project around the house... painting, planting, helping to clean out the garage, basement, attic (although not this time of year) and throw out and donate what they don't want.