craftgrrl | 3d easter egg from felt? and modpodge question

Sorry craftgrrls, I have no picture to post, just questions :3

First of all, on orientaltrading.com I came across a rather fun 3-d easter egg craft set (as can be seen here: http://image.orientaltrading.com/otcimg/41_1164a.jpg?resize(250x250) )

sadly, they don't ship overseas, but id like to make some for easter, does anyone have a pattern for a 3-d type egg?
I've exhausted my google skills and came up with exactly nothing. (alot of egg cozies though, but thats not what i want!)
I could try to make them without a pattern, but from the past I have learnt that even after several tries, ive never succeeded in making a 3-d anything myself xD

also, ever since I came back from the states with my jar of modpodge I've been happily modpodging over well, alot of my crafts. Then a while back it all of the sudden hit me, does mod podge yellow over time?
I'd hate to end up with a bunch of yellowed crafts after a couple of years :(