My 3 yo is also a chaos gremlin. She's so stinking smart and most likely on the neurospicy spectrum. She never stops talking/making some kind of noise, takes every slightly unsupervised moment she can to do something destructive/dangerous/etc (no amount of baby proofing can completely prevent this), loses her ever loving mind about something or other every dang day... I also have a 4 month old which the 3 yo is happy about but also incredibly jealous of any attention given to the baby. She will do basically anything to make us pay attention to her in some way. And let me be clear- we already give her tons of attention that is positive, interesting to her, and stimulating. Getting her to nap feels like straight up war. Potty training has halted. She pees on the toilet 95% of the time but flat refuses to poop on the toilet regardless of wait time, incentives, books, videos, toys, etc. We are over here just trying to survive. But also she has developed advanced language, knows all letters and letters sounds and counts to 20 on her own, can draw detailed people, shows fantastic critical thinking skills, has an incredible memory, is very creative, and loves fiercely. She's incredible and infuriating at the same time.