Idina Menzel and her sister, Cara Mentzel, announced their new children’s book called Loud Mouse in an exclusive interview with PEOPLE! Loud Mouse is an illustrated book for kids ages 3-5 and will be released on September 27! Here’s the adorable synopsis:

Dee loves to sing. She sings during her morning yoga. She even sings while practicing her math facts. She usually sings to herself. But when her teacher asks everyone to share something with the class, Dee knows just what to bring: a song. And as Dee sings la, la, la, la, LOUDly in front of her class for the first time, something extraordinary happens. . . .

They also shared that Idina is recording a song for the book! Idina told PEOPLE that Cara said, “Just don’t write a song that people like me and moms and teachers can’t sing.” Pre-order Loud Mouse now!

Here’s what they each had to say on Twitter today:

Hi everyone! Great news. I wrote a picture book with my incredibly talented writer/teacher sister @CaraMentzel. Had the time of our lives creating this story. #LoudMouse is poignantly and hilariously illustrated by #JaclynSinquett. pic.twitter.com/VTTicitv2A

— Idina Menzel (@idinamenzel) January 13, 2022

So excited to finally share the great news! @idinamenzel and I have written a picture book titled Loud Mouse. It's brilliantly illustrated by #JaclynSinquett and was an utter joy to create for you. Available September 27th for your reading and singing pleasure. pic.twitter.com/zCtRGkcobw

— Cara Mentzel (@CaraMentzel) January 13, 2022

Tickets to see Idina Menzel perform live in WILD: A Musical Becoming at the Loeb Drama Center in Cambridge, MA are on sale now!

WILD: A Musical Becoming is a new musical fable about a single mother struggling to hold on to her family farm and connect with her teenage daughter, whose determination to save the planet endows her and her friends with powers they never knew they had. Driven by the escalating climate crisis and created by Tony and Obie Award-winning playwright V (formerly Eve Ensler; In the Body of the World, The Vagina Monologues), Grammy and Golden Globe-nominated songwriter Justin Tranter (Selena Gomez, Justin Bieber, Ariana Grande, Imagine Dragons), and songwriter Caroline Pennell (Demi Lovato, Selena Gomez) and directed by Diane Paulus, WILD features Tony Award-winning performer and songwriter Idina Menzel (Rent, Wicked, Frozen) as a parent confronting what it means for her family and her community to survive in a world facing mass extinction.

Idina has been working on WILD (formerly known as The Circle of Becoming) for quite some time. ART held a virtual behind the scenes event earlier this year and Idina tweeted a video of her, V, Caroline and Justin working together in the studio in October 2019. Tickets start at just $25 and they are going fast, so get yours now!

Important Note: Idina is confirmed to perform December 5 – 23, 2021. Casting for remaining performances will be announced at a later date. Also note that the theater has COVID protocols in place and they can be reviewed here.