Round Robin Round I

I'm now participating in a quilt game called a Round Robin... You make a 'center' block and then you take turns with other people adding a ring around until it's a desired size... Usually 4-5 rounds... I've never done a round robin before... I'm doing it with my Paper Piecing Big Sister - Ruth in Indiana..

Here is my center:

Here is my center w/ one round and my friend's center with one round: