I was going to use the phrase "shrinking, shape-changing insectoid micro-spybots that can chemically transform upon command, climb up walls, and infiltrate small spaces." But that sounded so alarmist:

SquishBot is a program to develop a new class of soft, shape-changing robot. The goal is to design systems that can transform themselves from hard to soft and from soft to hard, upon command. Another goal is to create systems that change their critical dimensions by large amounts, as much as 10x. Such robots will be like soft animals that can squeeze themselves through small openings and into tight places.

Sweet dreams!

References:
* SquishBot - Advanced Chemistry Robot that Inches, Climbs and Deforms [Boston Dynamics]

Previously:
* Neat - Now We're Teaching Robots To Climb Walls [Video]
* Japan Unveils Ultra Creepy, Probably Evil Baby Robot
* Neat - Autonomous Robots With Weapons Strapped To Them