Simon tries out to be on a bubble ball team with his sister in this third book in The Not-So-Tiny Tales of Simon Seahorse chapter book series. Bubble ball is the most popular sport in Coral Grove. And Simon's oldest sister, Kya, is really good at it. One day, she announces that all the bubble ball teams are holding tryouts. Simon knows that whatever happens, he's bound to get a good story out of it, so he decides to take a swing at the sport! It sounds fun, plus Kya can help him practice! So when Simon is offered a spot on a bubble ball team, both he and Kya are super excited. There's just one problem: he's not on Kya's team, he's on the opposing team. Which means... they'll be playing against each other!