Token collections were added to the game.
Every day you can collect one random token.
Once you complete a collection you will receive a reward.
Tokens can be be traded between players by using the Send to player option.
You can access the tokens either by going to the Town Hall, or by Selecting Tokens in the Select menu.
Once you get to the tokens page, you have several options in the token menu.
When viewing a collection, the tokens that you have not collected are blurred.

The first collection is a collection of 15 random foals.
The first to complete the collection will receive 3 credits.
The second will receive 2 credits.
The third will receive one credit.
All the other players will receive 1 million coins.

Being a new feature, it will extend in time. Enjoy it!