Answer:
I am the ultimate killing machine used not once but TWICE I can be made by humans.
I fill a room but take no space.
I smell like blue paint pours like green paint and I look like a red truck.
I have three heads. Cut off one I become stronger. Cut off two I become ten.
What goes up and down, but does not move?
I am owned by Old McDonald.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic