Joanna Carter I'd check www.bernell.com or Red Green Toy Box. On Amazon there's a Pinkalicious Pinkadoodles book that almost-entirely cancels. But we make our own, and others have shared theirs with us. The color combo that cancels is: R194, G24, B52. So you can make word finds, Hart Charts, etc. with that color. Hope that helps.
Red print test screen.
Modification: Green detail on White background
White board/Green marker
Red/Green toy box activities
Vision Tap and Opto Apps
MFBF #2: BLACK background, RED detail, RED patch or Red/Green Glasses
WORKSHOP ACITIVITY: Black Felt Activities
Goal: accurate perception of details with one eye and the perception of the background with the other eye. Also, the perception of luster, Anti-suppression, and Detail recognition
WORKSHOP ACITIVITY: Tap-n-See Now Little Bear Sees
Background = Black, Images = Red, Select size and speed
Both eyes see the iPad, but only the left eye can follow the red bear.