O.k. this first one is not peeps, but who doesn't love chocolate bunnies and here you can go on a factory virtual tour is a good learning experience to see how they are made.
How about if you want to make your own peeps martha stewart shows us how.
and some peeps science is also posible
For arts and crafts your little one can really enjoy making this edible peep easter necklace.
I also liked this tutorial on how to draw a marshmallow peep
and here some peep art to get inspired to do whatever else you and your little ones like to do with them :)
I hope you enjoy them a lot :)