Re-watch the first movie you watched together.
Play on the playground–have a picnic there, swing on the swings or chase each other around.
Visit an arcade and challenge each other
Go to the park and fly a kite, blow bubbles and have a water gun fight.
Play a board game, card game, video game.
Go to a store and challenge each other to find a really sweet/creative/romantic gift for $10 or $20.
Go to a dive bar and play darts or pool
Go to different spots in your city and have strangers take your picture. Make a photo album or scrapbook of the day.
Dress up, cook dinner or take out, and have “restaurant night” at home!
Check your local paper or its website for upcoming free concerts. For shows in the park, pack a picnic basket and blanket so you can dance and dine in the same place.