This is the kemuridama 'smoke bomb' papercraft from our new friend toriaezu. It's got an anime feel to it as you can see from its facial expression. The kemuridama (in real life) is a mixture of sawdust, sand, and gundpowder that is sealed in a ball of wax then thrown on the ground to form a wall of smoke. It was used by Ninjutsu (ninja) practitioners for disorienting enemies and gives them a few seconds to either escape or dish a fatal blow.
Ninja Papercraft - Kemuridama (Smoke Bomb) [toriaezu]