Brilliant colors. 100% post-consumer recycled paper. Totally customizable. These are but three reasons why we love these notebooks. No wait. There's one more reason: the added feature in case you should ever lose your precious notebook. Each book includes a unique ID code on the inside of the back cover. If you, or your little one, should lose or find one of the notebooks, simply visit their online Lost & Found. The Ecosystem online shop lets you customize your notebook in 4 steps: 1. Choose the Artist (blank), Author (lined), Architect (grid) or Advisor (calendar) style. 2. Choose the cover type. 3. Choose the size. 4. Choose from a vibrant collection of colors: Watermelon, Clementine, Kiwi, Lagoon and Grape. Prices range from $10 to $20.