The "high-tech mouse with microchip sound" was an instant hit. It emits rapid squeaking sounds that cause small cats' eyes to widen to saucer-dimensions, and it keeps these sounds going indefinitely.
The problem is trying to shut it up. The slightest movement sets it off; stillness should cause it to become silent. But it doesn't, except very, very occasionally. There are no external controls.
The cats love it; when it does stop, they pounce and get it going again.
The instructions are almost non-existent, but tell us sternly: Do not eat. Horrid thought; horrid train of thought, in fact, of a high-tech internal squeaking noise making slow progress through one's insides.....
When my nerves start to emit a high-pitched, high-tech microchip squeak of their own, the mouse gets put in the (cold) warming drawer of the oven, out of everyone's way, and I ignore the saucer-eyed row of small animals sitting beneath the drawer gazing pleadingly upward.
Sometimes I set it off again myself accidentally, although I'm learning how to creep smoothly, ninja-style, into the kitchen and place the thing reverentially in the warming drawer. It's in there now, blissfully silent.
I did think for a moment that when little cats were sleeping the sleep of the very tired hunter, I might creep reverentially out to the wheelie bin with their prey, but on second thoughts, I'll eviscerate it instead, and stuff it with wadding and catnip, unless the microchip proves manageable. If it doesn't, I can happily bin it - in another bin in another street.
At the moment, it is silent, and I might just leave it to sleep till Doomsday tomorrow.