How many Usborne Starting Point Science books are there?

There are 7 books in the Usborne Starting Point Science series by Helen Edom, for ages 4-11.

Usborne Starting Point Science Books in Order — Wonderlit

Usborne Starting Point Science is a 7-book series for ages 4–11 by Helen Edom. Each book stands alone — start anywhere.

Start anywhere — each book stands alone.

That said, Science with Water and Science with Magnets are great first picks.

No particular order needed — browse and pick what catches your eye.