Memory Game Safety SignsOnline version This will help you practice safety signs. by Julianne Linza Watch where you are walking. Hazardous, toxic materials like blood are in here. Firefighters and EMTs work here. Do not pick this up! It could electrocute or shock you. This is a place where young adults who are in trouble could go. Keep matches, lighters, and cigarettes away! People are keeping this community safe.