The Senstor reminded me of another project called Outerspace, I’m so surprised that I didn’t post this before. It was a project which Andre Stubbe and Markus Lerner did during their time at the UDK Berlin in 2004.
Outerspace is a reactive robotic creature with animal-like behaviour. It can react to humans thanks to the photo sensors in the top part and capacitory sensors that react to human body contact. There’re some nice videos on the website showing this interaction.