These are the BEST Catechism instructions for kids.
They are bright and full of the true faith.
http://www.ignatius.com/promotions/faithandlife/
What I like about their style is, besides being true to the magisterium, they keep their lessons in a schedule for each grade. If your 1st grader is studying Pentecost, then your 5th grader is doing the same in an age appropriate way.
Thanks!