The Prince Who Turned Into a Toad — Shelley Chappell

A tale of sisterly love and science. While Kate and Rupert's parents are off touring the kingdom, Cousin Garil is in charge. He lets Rupert do anything he wants, but Kate isn't allowed to do any of the things she likes to do: no horse riding, no playing ball with her brother, no eating competitions — and, worse of all, no more lessons with Rupert's tutor. With Cousin Garil breathing down her neck and Rupert acting more toad-like every day, Kate’s plans to become a scientist are hard to put into action. Yet when Rupert gets himself into a fix, Kate's love of science might be all that can save him. A short story of 5, 800 words for middle-grade readers.