The authors’ search for a research validated model that would promote inquiry and allow an integrated approach to teaching science at the elementary school level led them to explore PBL (Bartels, 1998; Edens, 2000; Gallagher & Stepien, 1995; Krynock & Robb, 1999). A review of the literature, while informative at the middle and high school levels, revealed considerably less research on the use of PBL at the elementary school level. Therefore, this investigation was designed as a pilot study to examine the efficacy of PBL with younger learners.