well u play around customize ur igloo only if ur a member though.dress up ur penguin and
adopt a puffle.want cheats on how 2 to get a boost of 23,000 coins?go on to www.clubpenguincp.com i can swear to u that u will have loadsssss of coins.dont belive me?add me on
facebook.BYE!!!

(with membership) you can:
dress up your penguin
decorate your igloo
adopt ANY puffle
without membership you can:
meet friends
play games
change the color of your penguin
earn coins (for basicly nothing :D)
hope this helps!

(sorry if i spelt purpose wrong)
u can buy flag pins and backrounds
and SOMETIME AND RARELY (i dont think ive EVER had to do this) you pay for special party
items! (but i donr think it has happend yet, they SHOULD do it so non-members can waist
their coins on something worth it! :D
and if you unlock items online and unlock cloths or puffles in the treasure book, the non
mebers can wear the cloths and walk the puffle (like if they have 2 reds and one yelllow
they can also walk the yellow puffle even though its a members puffle though normal
gameplay