Simplify the following text for a Grade 4 native English-speaking person.
Original: The Creators ' work is used to pre-populate The Sims 3 Exchange . In the seventh expansion pack for The Sims 2 , The Sims 2 : FreeTime , an event occurs in which a Sim-version of Rod Humble , the head of The Sims franchise , gives the player 's Sim family an unopened gift box .
Simplified: Also it is said that other Sims will age with the player 's Sims as they play the game .