I SPY … hot air balloons! Can you spot a hot air balloon on the cover of other MG titles? Add to our collection in the comments! Share this:TwitterFacebookLike Loading... Related Author: Middle Grade Carousel A mother-daughter duo dedicated to all things Middle Grade, CJ & Elza run a series of monthly reading challenges. You can also find them on Twitter: @kindeladies, or Instagram: @mgcarousel. View all posts by Middle Grade Carousel