Penny Rose is new to town and has no friends. She spends her time making robots out of reclaimed materials. Then she runs into Lark, another girl who is also a loner who makes things out of found items, when they both find a compass. The kids at school think Lark is strange. Soon Penny Rose and Lark become inseparable best friends. That friendship is tested when Penny Rose gets a secret invitation to join a secret science club and she starts seeing Lark in other kids eyes.

This story is about what it means to be a friend.

All in all, this was a really cute story that brings in elements of being an outcast and finding someone who accepts you for who you are. And the pressures of fitting in, even at the exclusion of others. My beef with the book is this: the storyline revolves around science, yet they added the element of magic. I like the magical bits as far as the story goes, however I feel it sells short a book for girls interested in science. It's almost as if the magical component was added to make the story more appealing to young readers