Great entries you have for us. We ranked 53 and 58 because of how you used the basic shapes creatively and in a modern way- modern and simple yet fun is really what we are trying to go for.
The font styling and placement on 53 is our preference. It's not overly stark and strong. We'd also like to see what other symbols you can come up with, shapes aside. Our curriculum is called the learning tree and it focuses on hands-on and active learning, that provides kids with opportunities to learn through discovery.