On the Saturday before Halloween, hundreds of students and their parents went from booth to booth participating in science activities at an annual Fall Festival and Learning Fair. The Fall Festival and Learning Fair is a valuable annual partnership where culturally relevant teaching engages each child in hands-on, standards-based science lessons. This event is a joint venture between parents and faculty of a culturally and linguistically diverse K-8 school and teachers from San Diego State University. The Fall Festival and Learning Fair is an excellent tool for building a community of science learners that can be replicated in other schools. All students need to learn and use scientific core ideas and practices. The annual festival, described in this article, creates culturally relevant learning opportunities for students and parents.