We really like your design. It's clean & crisp, yet still playful. We'd like to see how you might adjust the design so that the word "savings" is emphasized, too.
Hi there glad you like the design - without overcomplicating the visual simplicity I think just making the 'savings' a touch heavier will do the trick for you. I think the key to this solution is keeping it clean and easy on the kids eyes. Uploaded for your comments :)