twos were very exhausting, but the threes were the worst. Four has been a bit better, but the intensity is still HIGH. My DD is 4.5 and I am still in that exhausted state (I stay at home with two girls full time). My DD4 was and is the exact same way. She is an extreme extrovert, and while I have my share of extroverted traits, I need time alone and in silence to rejuvenate and my intense, loud, active, wild children make finding that solitude very difficult. My other daughter will be turning three in a month and while people are constantly commenting on how smart and advanced she is, she is not doing the sort of things her older sister was at this age, but it is clear she has her own sort of smarts. I have no advice. I can't wear my children out and the more stimulating activities they have the faster their little motors go. My oldest calms and quiets a bit with books, good movies, drawing, and Playdough. Other than that, she talks constantly and quickly, dances, runs, bounces all over, and her little sister is right behind her.
It's amazing how I could have written this exact same post!! Does your youngest still nap?? My youngest (26 months) is fighting tooth and nail to stop napping and I'm not ready to let that go yet!
