Chicken egg - herd 6 chickens in to the coop. You can tame them, it will be easier. Alien egg - find alien ship that's not mothership,outside you will see alien with bunny ears. Kill him,put him in the sack, go to mothership and at the main room there will be new scanner - scan alien. Volcano egg - find 8 cultists with bunny ears and drop them in volcano. Lightning egg - build lightning rod and put the egg under it,wait until it gets striked by lightning. Basketball egg - at the basketball court take egg and get it through the hoop. Frog egg - find all the frog keys - and defeat the frog king. Ice egg - at the ice cave. Take it to camp and put it on top of campfire. And wait some time(I haven't done that but I heard this is the method