How do I choose the pictures?

With "Shaped (silhouettes)" or "Hidden picture" chosen, the card shows "Pictures (N of M, used in turn)" with every silhouette by group. Click a picture to use it or leave it out. The mazes take the chosen pictures in turn, page after page. A new book starts with 24 friendly shapes for children chosen (heart, apple, cat, fish, butterfly, star, turtle, house, bird, rocket, tree, elephant, car, cloud, owl, cupcake, moon, balloon, flower, snowman, pumpkin, gift, sun and leaf); if you leave every picture out, the book goes back to them.