The SPONSOR is effectively a parent’s Wallet at the school. The children don’t have access to it, only the parent does. As a parent you may choose to fund your Wallet with a larger amount of money and then disperse the funds over time from your Wallet to the student Wallets. The primary purpose thus is to save on multiple transactions (i.e. card fees) yet allowing the family better control over how much money each of their students can get their hands on.
You do not need to use the SPONSOR Wallet – you can directly fund your student accounts – it’s entirely up to you!