The MobiLimb finger can crawl across the desk, waggle for attention when messages arrive and be used as an interface to control apps and games.
It can also stroke its owner on the hand, which developer Marc Teyssier said could create more personal connections.
He told the BBC people generally found the finger creepy or weird because it was so unusual, but hoped it would be “accepted” in time.
Video journalist: Chris Fox
#BBC Technology News