8It's never too early to expose your children to the many wonders of nature. Third in the EARLY BIRDS(TM) Learning Series for children 1 - 4 years of age, MY OPPOSITES pairs core opposites using birds And, similar to MY COLORS and MY NUMBERS, this third fun book has big extra fun with streaming HD bird sounds that gives parents and children a real multi-media experience using BIRD QR, our free downloadable app. As with all Cornell Lab Publishing Group books, 35% of net proceeds from the sale of this title goes directly to the Cornell Lab to support projects such as children's educational and community programs.