>>42411
Oh neat. Haven't read that one. Which chapter is it?
Some other thoughts.
Languages! Coupled with the pacifier dummy training you can make it so that after they go through that you teach them new words all over again but in a new language they don't speak. Then they'd have to start out with baby talk with a lisp while being all drooly which would be so cute.
Furniture is also huge for me especially when it reinforces babyish activities.
Bouncer swings where someone is velcroed into a seat and the bungy cords are strapped to the ceiling looks so incredibly fun! You can get these in Etsy by the way which is a gold mine for ABDL gear (not affiliated in any way). Pair that with mittens, a gag, a diaper with some suppositories, and the keys in a timer box on a cord within reach and the little will be forced to jumo around in a messy diaper until the timer runs out. The height should be adjusted so they're just standing on the balls of their feet and so their legs will get tired from standing and so they'll bounce up and down trying to avoid sitting in their yuck. Pair all of that with a vibrator and they'll be forced to come in their mess.
Crib beds with locking tops with magnetic locks so the little can't get out on their own. Rubber sheets for the mattress and cartoon sheets. Segufix restraints for the arms, legs, and then the torso, especially so the little can't turn over if you restrain them on their stomach. An enema stand with a feeding gag and a bardex retention enema nearby. A baby monitor and a mobile custom built to play hypnotic sounds and flash lights that's just out of reach of the little above the bed. *Definitely* a potty training chart that should be on school sized poster board that the little makes and colors themself in the most humiliating design possible and it should be *big*.
One thing that would be exciting is a brain wave monitor hooked up to a TENS electrical unit. You wait until rem sleep is detected and then you attempt mild electrical shocks on the bladder peaking in timing until it starts disrupting sleep and then backing off, learning and tracking as it goes. Paired with a wetness indicator over time you could make it so that electrical jolts in less and less frequency and power were needed for wetting until they wet in their sleep naturally. You might be able to force incontinence with this method in only a couple weeks if you include daytime naps.
VR is a new thing, but it's too "scifi" for me. It seems like it would require too much cooperation by the little not to knock it off. Now a big screen tv, ear plugs, and a chair with straps is something else entirely.
I like the idea of a play pen but I'd want it be big and functional. If you took a medium sized trampoline and had iron bars welded around it with a peaked roof and a gate it would work. You'd color the bars to make it look like playground equipment. Inside there should be giant bears with dildo and fleshlight attachments that the little would be severely punished for playing with.
I like high chairs but I'd want the little to have the dominant towering over them. So a recliner chair with the feet propped up and then a tray out over it not unlike a custom wheelchair. Similar seats for car seats or wheelchairs themselves would be wonderful. Enforced long term sitting as a way to punish the little would be incredibly sexy. Straps at arms and legs and over the waist would make it so they couldn't get out. As for food, a blender would be essential. Puree everything! Anything to make the littles stool as soft as possible. Hollow butt plugs might be fun but pump plugs or anal plug tampons that they're forced to push out is up there too. Severe cramping with a plug that's just slightly too large in their bottom for twelve hours. They can go whenever they want. In their diapees.
Someone mentioned a classroom setting somewhere and I totally agree. School desks and a chalkboard and maps and a world globe and a teacher's desk. Also a paddle on the wall and a sawhorse to be bent over if they get answers wrong. Timed tests and book reports and grade appropriate testing are all exciting, especially if you can switch subjects enough so they're always at a low grade level (cycling languages is one idea). I like the idea of having them watch cartoon shows and then write reports on what happened or risk being punished.
I like the idea of a custom potty chair. Someone mentioned a heated seat that made it hurt after spankings which I think is neat, but I'd want a large backrest with a belt that made someone have the small of their back against a tense unit. A childish singsong voice would say "go potty!" while giving them shocks in their back every couple minutes.
Rocking horses sound like a must have but I don't know how I would change them up to be more interesting other than add a vibrating seat like the rides you used to put a quarter in.
Playground equipment! But all adult sized and improbably large. A tube maze where you can lock people inside and then only have one exit, with a diaper and suppository for encouragement.
I also like the idea of locking ankle reins on bungee cords that are super long so you can lock the little in the park around the playground equipment.
What else? Chastity devices. I want to like these so much, but they're tricky. For a girl you risk yeast infection but with the right belt and cleaning it's ok. For the guy the fit can be difficult because they can get blue balls or it can damage the penis. Plus it tends to be a sissy specific thing. If there were a chastity cage that worked then the elements that I would emphasize in the stories would be how the dominant woman would use their sexuality to cause the little pain. I've seen this in a bunch of stories where the woman will excite the little until they squeel and beg to be treated like a baby so they don't get hard in their cage. Thats fascinating as a punishment method. There isn't much of an equivalent in the female side of things.