ns in my Pocket in this start to a brand-new chapter book series about Frankie Sparks, a third grader who uses her love for science and math to help her solve problems she comes across in her daily life.

The best thing EVER is happening in Frankie Sparks's third grade class: They are getting a class pet! Their teacher, Miss Cupid, tells them they will vote on their pet, but it has to meet some "parameters." Their pet must:

1. Fit in aquarium.
2. Cost less than $50.
3. Be easily portable.
4. Be able to be left alone for the weekend.

Frankie thinks that a rat--just like the rats in her beloved Aunt Gina's lab--would be the perfect fit. But her best friend, Maya, doesn't think a rat would be great at all. They are kind of gross and not as cool as a hermit crab, which is Maya's top choice. Using her special workshop, can Frankie find a way to convince her teacher and her best friend that Team Rat is the way to go?