This study is under review in the Journal of Early Years Education, the study reports the findings of a mixed method research study (qualitative and quantitative) on the effectiveness of specifically developed learning resources and workshops on handwashing for children in the Early Years Foundation Stage (EYFS) in the UK. The A Germ's Journey educational resources were developed to aid both young children's understanding and engagement with microbiology and hand-hygiene, currently there are limited learning resources that teach young children about the cause and effect of germs.