The JW Cataction Canvas Butterfly with Doorknob Teaser is an interactive toy that easily attaches to any door knob. This durable Canvas Butterfly is filled with catnip and has an engaging crinkle sound inside. Multi- textured streamers are attached for added stimulation. The bouncy wire keeps kitty jumping to catch the butterfly as it continuously jerks and swings in multiple directions. Simply detaches to move from door to door.