Before Transformers, there were “Micronauts”. Micronaut figures were marketed as actually being 3.75″ cyborg beings, hailing from the fictional planet “Micro Earth,” and disguising themselves as toys.
Micronauts toys were known for their high number of articulation points (averaging 30) relative to other toys of similar size. The toys included vehicles and robots, and all of the Micronauts toys used interchangeable 5-mm connectors and ports that could be transferred from one toy to another.
With only the highly-accessorized Galactic Defender in the 10cm category, Series 3 focused heavily on Robots, particularly the “Trons,” and the new Micropolis line of interchangeable habitats, based on a gray four pin flex connector.