I'm teaching children's church this summer with ages ranging from Emily at 4 months to Alex at 7 year old. We're using The Big Picture Story Bible and a free curriculum found here. You have to search for The Big Picture Story Bible as there is no other link to the full series.
Not only is the curriculum well done, but the generosity of its author to present it free online allows people around the globe to benefit. I am so thankful for free printable resources, and the ability to teach our children through them.