This is called"" FLIPBOOKKIT"" is in very good conditions. It is a modern version of an ancient optical device. The"" Flipbookit"" is a rotary mechanical flipbook kit that allows"" play"" an animated film of 24 frames. Measure 5"" x 5"" x 5"" . Comes with cards animation Horse Galloping, these images were originally filmed by Edward Muybridge in California in the late 1870/1880, partly to establish whether a horse really had all four feet off the ground at some point during the gallop, and if so, what position they were. Some painters had previously shown galloping horses forelegs stretched forward and rear back. These pictures established a YES horse had all four legs lifted off the floor at some point during the gallop, and the four legs were gathered beneath the horse at that point. This optical device has been called in several ways one Kinora a Mutoscope, and a machine"" What the butler saw"" . This piece was made sometime between 2010 and 2012. I make this note because I do not want to be any confusion about this piece. There is an antique, is a modern piece made to the style of the old machines.