Nature's Notebook is a fun and educational citizen science project focused on phenology throughout the United States. Here, nature lovers of all ages can contribute to science by observing the seasonal life-cycles of plants and wildlife. Visitors to Nature's Notebook will find educational resources for all grade levels (including lesson plans, activities, and archived presentations), help for local phenology groups (including how to start one), links to multimedia (including podcasts, videos, and webinars), and most importantly, opportunities and instructions (also available in Spanish) for participating in one of their many nature observation campaigns. After creating a free account, participants can enter data of their observations for as many species as they would like and they will also have access to a dashboard showing visualizations of their entered data. Nature's Notebook provides numerous resources for learning how to do phenological observations and they also have mobile apps available for Android and iOS devices. This long-running program was launched in 2009 by the USA National Phenology Network, "a national-scale science and monitoring initiative" formed in partnership between multiple government agencies, resource managers, and volunteers (among many others)."