This is a message from Polo Field:
Hey penguins, How do you think you'll earn these Stamps? Give us your best guess! Waddle on!
PUFFLE STAMPS! AWESOME :) I hope we can earn these when we are Playing Puffle Roundup :)
UPDATE: Thanks Anonymous for noticing that these are Activity Stamps! Hmmm…my new guess is that those Stamps will be available to earn at the Puffle Gym and Spa :)
UPDATE: Now we know MORE :) Puffle Digging Sneak Peek Video :)