2 books · Ages 9–14 · Chapter Books
The Book of Daring Experiments is a 2-book series for ages 9–14 by Sean Connolly. Each book stands alone — start anywhere.
Start anywhere — each book stands alone.
That said, The Book of Ingeniously Daring Chemistry and The Book of Perfectly Perilous Math are great first picks.
No particular order needed — browse and pick what catches your eye.