Fisher Price Stackable Rings Vintage

Classic vintage Fisher Price 5 color stackable rings, also known as Rock-a-Stack. In good condition for its age. All the rings are still vibrant and in good condition. Made in the USA, this toy measures 8"H x 5"W x 5"L. There is one small dark circle on one side of the base (see photos), however I think that is a drainage hole similar to the drainage holes in each ring. This comes from a smoke-free home. Offers welcome.