Here are a couple I found on pinterest or google. This one is from Once Upon a First Grade Adventure. She has a great printable for you to use here too!!!
This one is from One Happy Teacher
And this one is the one I chose to follow most closely because had a bunch of card stock paper in fun bright colours in my grade one classroom that I could use up. I also love the magnetic letters. I have trillions of them in my classroom so this is how I'm going to set it up! I love it! Go check out her blog at Mrs. Ring's K-Crew Kids. She even has a printable for the balloons!
And finally, here is mine!
Thanks, Mrs Ring!