FREE or Really Cheap Souvenirs:
Did you know you can get a FREE button at Disneyland's City Hall & California Adventure's Chamber of Commerce? Yep, they give away birthday buttons, anniversary buttons, "I'm Celebrating" buttons etc... Stop by either location & pick up your FREE souvenir. Make sure you wear your button because sometimes you get a surprise FREE Dole Whip like I did on my birthday one year at Disney World.
Make sure you bring pennies & fifty cents so you can collect pressed pennies from around the theme parks. These souvenirs take up little space and will last forever, much like your Disneyland memories.