Let your and your date's inner child come out with a trip to the local playground. Play on the jungle gym bars, hop-scotch, slide down the slides and take turns pushing each other on the playground swings. If there is a sand box, build sand castles together.
This is a perfect inexpensive date to go along with a picnic lunch where you can be silly, giggle, play tag and remember the fund days of being a child. While this is definitely not a date that you want to do on a weekly basis, it's certainly one that will break up the typical dating routine when you are searching for something new.