play is child-directed play that occurs when children actively explore and experiment with ideas and materials in a planned, challenging environment that meets curriculum goals

Constructive play.

Explanation:

Constructive play is an organized form of play that is child-directed. It meets curriculum goals, that is, it fulfills a certain purpose in helping children develop. Children get to experiment with materials (three-dimensional blocks, for instance) and ideas to create something. The challenges to do so increase in complexity as the children grow older.

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.