I 100% recommend it for 3rd graders and above. I is SOOOOO good.

This book was educational; you'll learn a lot about science and Albert Einstein. There were cliffhangers at the end of almost every chapter - I never wanted to stop reading it! It was great to read about a group of young geniuses working to make the world a better place and stay away form the evil Dr. Zacchaeus Zimm. When you finish this book, you'll want to read the next one in the series.

It is such a fun and interesting book! I learned something new on every page! A good no..Amazing book!

I LOVED IT SOO MUCH!

Best book ever!!