Gather up some favorite nature finds to put in a cute jar with a little ribbon or yarn attaching a heartfelt note and you are all done.
My mom loves white and we thought this jar of white shells we collected over the summer would be a wonderful gift for her. My son gave away a jar of sea glass he collected. I have always loved feathers in glass jars. You could also use acorns (just make sure they don't have larva in them) or even "pretty rocks" as my son likes to call them. There are so many possibilities.