This set includes two genuine Anki Cozmo Robot replacement cubes, specifically blocks 1 and 3. These blocks require batteries (not included) and have not been tested. The blocks are compatible with Anki Cozmo robots and would make a great addition to any robot enthusiast's collection. The brand is well-known for producing high-quality robotic toys, and these blocks are no exception. The theme of the blocks is robots, fitting perfectly into the category of toys and hobbies. The blocks were manufactured in the 1970-now era, making them a valuable collector's item for all robot fans out there.