For infants and toddlers, a theme like “Animals” is okay but, as children get older, we have to start getting more specific and introduce new vocabulary. This comprehensive list of ideas for preschool units will help teachers be more intentional in their planning. That said, it’s not about making kids experts on a subject; the goal is the development of cognitive, language, motor, creative, and social skills. Each theme can be used to target each developmental domain when approached with creativ