The present invention is directed to a toy gun system that may include a toy gun having a housing with a nozzle, wherein the toy water gun may be adapted to discharge an output stream of liquid through the nozzle. The toy gun system may further include a wheel fabricated from an absorbent material, and a support member mounted on the housing of the toy gun that may have the wheel rotatably mounted thereon. The wheel may be disposed proximate the nozzle of the toy gun and positioned such that at least a portion of the output stream of liquid impacts the at least a portion of the wheel to cause the wheel to rotate. The at least a portion of the liquid in the at least a portion of the output stream of liquid may be absorbed into the at least a portion of the wheel impacted by the at least a portion of the output stream of liquid, and the at least a portion of the liquid absorbed into the at least a portion of the wheel may be projected outwardly from the at least a portion of the wheel by resultant forces of the rotation of the wheel. At least one of the toy gun, the wheel and the support member may adapted to cause a sound to be generated by the toy gun system when the at least a portion of the of the output stream of liquid impacts the at least a portion of the wheel to cause the wheel to rotate.