My daughter has been getting her 9s and 6s mixed up. She gets them right about half the time. The great thing about the Peaceful Preschool numeral cards is that she can self-correct by counting the dots. For a quick math lesson, I gave her three cards and instructed her to order them a certain way (first three digits of my phone number). She mixed up the 6 and the 9 but I didn't stop her and most importantly I did NOT tell her she was WRONG! I let her finish her thought process and then asked her a series of questions that led her to finding and correcting her own mistake. Why is this important? Because as children grow, they become more afraid of messing up. They don't want to take chances or even TRY for fear of getting it wrong. Take every opportunity to build your child's confidence. Confidence is one of the 6 Cs that help your child become "well-adjusted critical thinkers," ( Becoming Brilliant, What Science Tells Us ...