As with all parks, you can have your photo taken by a 'snapper' and they give you a ticket and there are many booths to go and have a look at it and purchase it if you want to - no obligation. They usually take them at 'good photo spots' so they are often quite good.

Also, there are plenty of places in the Disney Parks where you can go and have your photo taken and you decide what background you want to put it onto, ie the castle, one of the rides - Mickey of course!
They also do stickers, key rings, paperweights etc.

Well worth looking at as they are a great memory.