Aww, I really loved this one. Totally fun and charming family drama with a hint of sci-fi that delves into some ethical quandaries in a really cool way. Reminds me a little of [b:Tuck Everlasting|84981|Tuck Everlasting|Natalie Babbitt|https://d.gr-assets.com/books/1311978194s/84981.jpg|1955922] but it's more contemporary and lighthearted than that? A great one for tweens who are interested in science.