101 punishment ideas by nanny Chloe is an ok read. As well as the second book 49 more punishments.
Some of my own favorites:
Make your little mess their diapers and go down the slide repeatedly at the playground until you say.
Numbing cream on genitals and then given permission to have humpies. No hands allowed.
Spiked booties, forced to crawl.
Sticky sandpaper on the leg gathers of their diaper, forces them to walk funny.
Forced feeding. Maybe something yucky. Whatever is left goes in their diaper.
Have them sit on their knees with ankles crossed on the bare floor in the corner. Their leg muscles will go numb and they can't walk.
Bottle/sippy cup roulette. Prepare 3 drinks for your little and they have to drink the one without laxatives. Surprise, they all have laxative.
Have two subs diapered and wet/messy. Remove their chastity cage and tell them they can make stickies with their hands tied behindtheir backs, only each other. Whoever goes first, game over. Loser is left unsatisfied.
Tie your little up and put on some cute nursery rhymes on repeat with headphones.
Make them sing and recite cute dances in order to get their diaper changed.
Condition them to orgasms within a certain time or no diaper change. Gradually decrease the time required.
Frontal padded spankings.
Make them always sit on the arm of the couch or a hard chair/stool.
My #1 punishment. Babies will always smell and feel like babies. Keeping plenty of rash cream on hand, your little never gets a change unless their diaper is 1. Completely full and 2. They are ready to pee or poo in their new diaper immediately after being changed. Never to feel a dry clean diaper again. If they can't go #1 or #2, mommy or daddy is prepared to go in baby's diaper for them.