How to say “I've brought children's books for the book exchange; can we make some room for them?” in Japanese

In Japanese

子(こ)ども向(む)けの本(ほん)を持(も)ってきたんだけど、本(ほん)の交換箱(こうかんばこ)に少(すこ)し空(あ)きをつくってもらえる？

Kodomo-muke no hon o motte kita n da kedo, hon no kōkanbako ni sukoshi aki o tsukutte moraeru?