How do kids cash in S'mores for rewards?

How do kids cash in S'mores for rewards? I figured how to move it from the earn jar to the spend jar, but couldn’t figure out how to put the reward to it. 

Kids can cash in their S'mores for a reward as soon as they earn enough. The Jars are to help kids learn the concept or saving and spending, however they do not need to manually apply those S'mores to rewards. To redeem a reward, follow the steps below. 

1. From the Home tab, tap Rewards.

2. On the Rewards Shelf, tap the reward you wish to redeem.

3. If you have enough S'mores, you'll be able to redeem the reward. Tap Claim Reward.

4. The Congratulations screen will appear to show that your reward has successfully been redeemed.