I used to be a Sunday school leader for this age. I'm trying to think back. All i can remember off-hand is illustrating Paul's passage on the armour of the Lord by making Roman armour out of cardboard and dressing one of the children in it while slowly reading the passage. There are a few websites i used to use. Sorry about that. Oh, one thing you could do is to march them around the church and do the shouting thing to re-enact the Walls of Jericho. Um, oh, there was another thing where we wrote Bible verses in different languages and read them out to indicate the speaking in tongues thing.
buy a world map and label Biblical ancient names on their modern countries (Gog -Russia, Babalon- Iraq, etc) Do you homework on this and it will tie into Biblical prophecies about these nations.
Wal-Mart sell religion stickers. I saw crosses and stuff like that. Perhaps you could make a collage.
Ideas:
*Draw some pictures of holy scenes.
*Use the religion stickers around the blank spaces.
*Print out some Bible passages and glue them on the cardboard.