1. IN THE COMBINATION OF A PROJECTILE, A BLOWGUN ADAPTED TO IMPEL SAID PROJECTILE, AND A TARGET, SAID PROJECTILE COMPRISING A HEAD PORTION AND SAID TARGET INCLUDING A SURFACE PORTION, SAID HEAD PORTION BEING POROUS AND RETAINING WATER WITHIN ITS PORES, SAID WATER BEING RELEASABLE ONTO SAID TARGET WHEN SAID BLOWGUN IS OPERATED TO CAUSE SAID PROJECTILE TO STRIKE SAID TARGET, SAID SURFACE PORTION OF SAID TARGET INCLUDING A WATER REACTIVE MATERIAL COMPRISING A WATER SOLUBLE DYE WHICH FORMS A VISIBLE SPOT WHEN SAID WATER IS SO-RELEASED WHEREBY A VISIBLE INDICATION OF THE LOCATION OF IMPACT IS PROVIDED.