Childhood Lead poisoning can lead to cognitive impairments, learning disabilities, impaired hearing, behavioral problems, and at very high levels, seizures, coma and even death. Children up to the age of six are especially at risk because of their developing systems. They often ingest lead paint chips and inhale dust particles while playing in their home and yards in pre-1978 housing. In ENVS 404, Penn undergraduates learn about the epidemiology of lead poisoning, the pathways of exposure, and methods for community outreach and education. Penn students collaborate with middle school and high school teachers in West Philadelphia to engage school age children in exercises that apply environmental health research relating to lead poisoning in their homes and neighborhoods.