You can redeem your stamps for great rewards. The more stamps you have the bigger the rewards you qualify for. Below is a list of the available rewards, to redeem, come to the City Building with your Passport to redeem your stamps for rewards.
Reward Level 1 (Requires 20 Stamps or more)
Reward Level 2 (Requires 40 Stamps or more)
Reward Level 3 (Requires 100 Stamps or more)
The reward program is sponsored by: