Stella the Mouse, Nico the Toad, Delilah the Spider, and Bo the Parakeet are nervous about Testing week, but by working together they get ready to do their best.

Already so worried about the big second grade test that his stomach is upset, seven-year-old Tiger Turcotte, whose parents are Black, Meherrin Indian, and Hispanic, gets stuck on the question about race.

Young Simon Beck is terrified of his upcoming astronomy test, that is until a friendly alien named Neil Newton shows up and takes him a tour of the Solar System that he will never forget. But zipping around space isn't as easy as it seems when they have to dodge ice rocks in Saturn's rings and escape a dust storm on Mars. In the end, Simon becomes an expert on all the planets and even the Sun, but his teacher has a surprise for him at the end!