Question

How does tommy show his greater experience to margie

Answer 1

by telling about the older school and telling that the older schools have teachers who were men and all the children's used to come in a special building

Answer 2

AS WE KNOW THAT TOMMY IS ELDER BROTHER OF MARGIE IF HE IS ELEDER HE WILL HAVE KNOWLEDGE THAN MARGIE  AND TOMMY FOUND THAT BOOK ATTIC and she had given to his elder brother he had read that book and seen at first so he had shared his greater experience with Margie