Like new play circuit cat toy. Assembled once but unfortunately for me, my cat prefers wand toys. Sight, sound and touch are key senses used when hunting prey. The Catit Design Senses Play Circuit incorporates all three and is specially designed to entice, engage and entertain your cat whirl appealing to his natural hunting instincts. Gray and green ball, specifically designed to attract cat’s attention. You can also connect other Catit products to create a complete Sensory Activity Center! Smoke free home. Questions? Leave a comment below!