Knocker device remotely "knocks on wood" to explore long-held superstition

Designers Shashwath Santosh and Nithin Eluvathingal have created a small remote device called a "knocker" that attaches to a tree and knocks on wood from afar to explore well-known superstitions. The conceptual device "knocks on wood for you" when wood is out of reach, according to the design team.