Peeps are the most heavenly thing ever. I have been known to consume a whole box in one sitting.
I had a friend send me some from the states, and I brought them into work one day a few weeks ago (I work in London now). Everyone in the office was terrified of them - they thought they were toxic or something (the verdict is still out on that one!) Anyway, after a taste, a few of them are now converted Peep fans!
You can actually take a tour of the Just Born factory in Bethlehem. Haven't done it, but I've been to Bethlehem.
Speaking of Cadbury eggs, you can get them year round in the tube stations, three for £1!