Stop motion (or frame-by-frame) animation is a general term for an animation technique which makes a physically manipulated object appear to move. The object is moved by extremely small amounts between individually photographed frames, creating the illusion of movement when the series of frames are played as a continuous sequence. Clay figures are often used in stop motion animations, known as claymation, for their ease of repositioning. Software applications such as Stop Motion Pro, istopmotion and monkeyjam have made the technique popular among young filmmakers.