Sometimes I'm getting crazy when I see how many duplicate of the same object we accumulate. In our home (with kids) we have at least:
20 pairs of scissors
30 kitchen knifes (table knifes not incl.)
8 Swiss army knifes
20 drink bottles
Hundreds of pencils and markers
7 matress (normal ones) + 4 inflatables ones
20 bed sheets
10 polar blankets (in an overheated modern appartment)
20-30 kitchen towels
25 pool and shower towels
15 backpacks
12 balles (toy of the kids)
8 bicycles
7 skate scooters
...
I could continue like this for hours.

For some times I have been thinking about making a little art project and gather one kind of a given object with a single utility and photograph them on a table or on the floor. It will end up with a photo series to show the ovet consumption in our modern society.