2d artificial materials
2d object
Furniture
2d chair
2d bed
Table
2d weapon
2d gun
2d sword
fork
needle
2d arrows
2d machine
simple machines
2d wheel
Fastening device
lock
loop , knot ,
join
loosening device or security token
key
complex machines
2d vehicle
2d tool
2d bar
2d board
2d cup
2d elevation
PAPER TOOLS
message
book
money
paper
Infrastructure
2d stairs