There are a few things that I found around the house that were conductive. Most were found in the kitchen, as it seems that what conducts electricity is mostly metals, water, sugar and salt...
Measures of the resistance:
Marker tip 2.5MΩ
Cheese grater 1Ω
What wasn't conductive was generally plastics, paint, wood, aluminum, cotton and other fabrics, and glass. What did conduct electricity without any resistance was metal such as the one found in utensils.