The coolest gadget I can't think of is the Unthinkable Gazoo. It scurries around on little robot legs, senses electromagnetic fields, and has super-sharp eyes in all directions that can also see infrared. The Unthinkable Gazoo shoots an electrical charge at anyone who catches sight of it, which temporarily scrambles their brain and makes the memory of the last minute slip right out of their mind.
It was born in the junk heaps of Scachon Do, where all the old and broken gadgets and electronics are thrown out. One particularly advanced electronic brain was tossed there, because it had broken from its previous body – a device to read the moods of babies and produce the most appropriate toy – when fallen on by one especially obese toddler. The electronic brain, still mostly working except for a few fried circuits, sat in the junk heap for only a few weeks before a massive strike of lightning fused it to other parts lying nearby. It found it was able to move them, and quickly acquired a new body, much smaller than its original form, built from discarded bits of gadgets.
The Unthinkable Gazoo is very good at avoiding people, and often sits in the sun recharging, taking energy both from the sunlight and the vibrations of footsteps and moles digging in the earth. Much of its time is spent offering various pieces of trash to trees, depending on the mood that it senses the tree to have.