Creatures Caves

Okay, imma try to work from the top to the bottom here.

For the door thing: how about torii or what's it called or the interporters?

The cam and the incubators sound interesting. Perhaps even both in one? Some kind of egg cam.

Useless gadgets are out there. My dummy gadget for example. According to CU7, the perpetual teacups have a similar function.

The.... uuuhm.... egg collector advanced I think was it could do something similar. It sorted eggs by a quick genetic analysis into multiple piles (norn, grendel, ettin, geat). When it was carried by a vehicle, it put all eggs in said vehicle as well. Hooking it to a pulsing switch should do the trick.

Potted plants are always nice. The toy rescue seems even nicer, though.

Neat! Reminds me for some kinda alchemy idea I had a while ago, which would work in a similar fashion as Ghosthande's cauldron in KT, just producing food and not spoiler.
The teapot sounds even more like it!

Huntable clouds, I imagine that hilarious

Hey, even with a suitable breed!

I think critters have that effect anyways, as a built-in stimulus in the most genomes. The effect probably could be amplified, though...

Can't help with the garden box plants.

Now that you mention it, actually weird that nobody had the toxic doc idea before. There is a plenty of replacement agents, but no actual diagnosis tool...

Might be useful to prevent eggs from hatching right in your hand. Happened to me a few times.

Argh, tricky thing. You had to hold the entire plant in some kind of container, so you had a huge invisible hitbox. A greenhouse would work better, since it is huge anyways.
And even then it is questionable. You can simulate different climates to a certain degree, but there is a different problem. It is the same as that aquarium idea that was once discussed in the IRC channel: once the seed/fruit/whatever turns into an actual plant (or the fishies mate), it creates an utterly new agent. It wouldn't know that it had to spawn inside the greenhouse and spawn in front of it instead.
Also, many agents additionally directly respond to "being carried". Most plants won't mature when carried by anything (in this case "anything" includes agents with an inventory, such as the greenhouse). Some even suffer from an accelerated death, see the NG4 fish for example. The "room type" of the inventory is set to the default value of all vehicles: -1. It means "be the same room type as the room you are in. When not in any room, be air". That means when you hold it under water, your inventory literally gets flooded, telling it's content that it is under water. When you put something inside it which needs special living conditions, it often dies anyways, since it is held by something.

The slider thingy is another complicated thing. First of all you had to find out what kind of slider they are. I personally distinguish between brain-sliders and pose-sliders.
Pose-sliders simply lack pose genes, leaving them basically paralyzed, but are fine otherwise (steven hawking-ish). Making them mobile could work I guess. You just additionally had to simulate the attention thing, since pose sliders are basically "unable to turn their heads" to look at stuff. Even if they try to, they can not look at things. That actually makes things even easier, though, since you have an agent doing the moving stuff anyways. Reading the noun a norn wants to look at is a matter of 2 CAOS lines, finding a suitable agent around it maybe 10 more lines or so.
Then there are brain-sliders. Brain-sliders got not any or just a very damaged brain, making them them unable to move because the muscles simply get no orders to do so. Even if you made them mobile somehow, they'd do nothing unless you simulated a brain as well. That goes a lot further than the attention substitute for pose-sliders, since you had to do all the thinking inside the agent. The biochemistry is not rarely corrupted as well, so I guess we had yet another thing to simulate. Seriously, better just kill them, it ain't worth the effort.
If you really wanted to make robonorns "CAUSE I CAN!!!", some kind of bibble ex machina maybe, you would be better off making just an utterly new genetic breed. You need the creature as mere memory to hold chemical levels and the status of the brain and as interface for the very basic scripts, such as creature-to-creature. Normal sliders would have way too many mutations to make them an effective interface. The genetic breed would easy and way safer. All it really needed would be a gene to define the species, a half-life gene, perhaps some intial chemical concentration genes and some brain lobes, not even any tracts.
Of course that's all just if you wanted them to participate life as "normal members" of the norn society. You could just pump em full of all chemicals they need as well, but... why? I would go for ordinary highlanders instead, they're more interesting.
Lastly, many, though not all, partially disabled creatures (such as blind ones) probably could get help again. Some things can be substituted quite well with scripts, but others less.

Instant fun, lol

Alright, sorry that this post turned into half of a scientific paper, I just wanted to give a detailed overview of what's possible and what not XD