I really like Rachel Woods site. She has so much besides just clip-art, and ALL of it is LDS based. I used her clip arts exclusively when I was Primary 1st Councilor. She has most of them in color and in black and white. You can download the black and whites and have the children color them in!

She also has the Candy Wrappers - those are so much fun for the Activity Day Girls to do, then take to the in-actives. Ditto RS, YW & YM! We also did that in Primary.