If you go to the NC Mall, you will get a free "Green Toy Negg". The Spring Celebration event will be here for 2 days, collect it every day and you may be eligable for a Bonus Prize~
More Info: http://www.jellyneo.net/
Spring Celebration information is also on JellyNeo. You also have 2 other neggs to collect.
I've gotten the green toy negg, and I opened it as shown in the photos.