A few summer interns decided it would be fun to pull a prank at IDEO before we left. After some scheming, we began building a musical staircase to lead up to the toy lab in the Palo Alto office.
After some prototyping, we eventually used some distance emitter sensor pairs to trigger various sounds when people walk up and down the stairs.
You can read more (and download the code!) at our IDEO Labs blog post.