Tonkanut, Whatever kit built that Piasecki whirlybird is something many an aviation enthusiast and old pilot would enjoy finding. I flew the Boeing Vertol follow on CH-46 A/D/E for 15 years and had a blast.
As far as Erector/Meccano sets go, the market for the sets is niche but strong. My set was the basic one as a kid but I built more project toys with that, found I enjoyed the abstract designing ability and learned a lot about engineering as played. My grandkids, only 4 and 3, enjoy helping Gramps build simple things for their Brio train. It may not last but the memories are priceless. I am actively planning to build several animated scenes using the motors from a set of erector parts and belts.
