The recommended age for children reading Magic Tree House Books depends on the child's reading level. The estimated reading levels range from 2.5 to 3.7 for the series. This translates roughly to the ages of seven and eight.
Reading levels vary from child to child, but the publisher of the book series, Random House, suggests that it would be suitable for all readers in the second and third grade of elementary school. The Magic Tree House website offers a variety of puzzles, quizzes, and games for children to enhance learning and build a child's reading capabilities. Reading to or with the child will help to gauge the level of comprehension and identify any difficulties.