Hey there! I guess I'm a little late but I'll post for others that need the same thing....
On my site,
Keep Up ESL: Free lessons, games, flashcards, cartoons, stories, and more!, you can get some great interactive material that is designed with kids in mind. There are some simple storybooks and cartoons available that the children I teach absolutely love. Also, there are talking flashcards in the quick study section (along with a memory game). I hope these help!