Take a close look at this cheerful grandmother as she practices yoga on her purple mat, standing gracefully in a tree pose while wearing a green, flower-patterned outfit.

Though the two pictures appear nearly identical, several tiny details have secretly changed, and your challenge is to spot every hidden difference. Begin with her face and hair, examining her expression, curly white hair, glasses, earrings, and necklaces closely. Next, study her green shirt, paying attention to the neckline, folds, and orange floral patterns, since even a missing petal could be one of the changes. Don’t overlook her folded hands and arms, where subtle shifts in finger position or clothing can be easy to miss. Continue down to her pants and legs, comparing patterns and folds, then examine her feet and toes for small positional changes. Finally, check the purple yoga mat’s color, edges, and markings. Step back occasionally to compare both images as a whole, since some differences are easier to catch that way. Take your time, stay focused, and see how many hidden changes you can find.