I do recall some kind of construction kit that included slotted disks, but I think this had other pieces as well. As for Deely Bobbers, weren't they kid's beanies with two springs sprouting from the hat with little plastic things at the ends ... that bobbed? —Dan ----- It was definitely Deelie Bobbers! Thanks. (I misremembered the number of slits; it's eight rather than four. Also, I misremembered the name as "Deely Boppers", which is something else entirely.) -----