Teach your kids about the power of saving and score a free ticket to the zoo while you're at it. Kids ages 17 and younger can open a Early Saver account at GTE Financial and immediately start earning 6.99% annual percentage yield. The account only needs a deposit of $5 to get started and the APY accrues on account balances of up to $500. There is no monthly fee on the account or balance requirement. With every account opened, receive a free child's ticket to Lowry Park Zoo.