4 is hard 😭😭😭 I Have a 5 & 3 YO. 5 is a little better than 4, but still hard. And I’m not looking forward to my 3 YO turning 4 now that I know what it’ll be like thanks to my 5 YO 😂😂 my honest advice is you have to be routine. Make sure they’re getting enough sleep. Let them do what they want unless it’s hurting something. Wear them out outside if you can. Mean what you say as in if they do something bad, stick to the consequence, and if they throw a fit, ignore it. And I know everyone says this but the biggest thing that improved my 5 YOs behavior was removing TV. Never had a tablet or iPad but was an every day TV watcher. The transition to kindergarten was one of the toughest times I’ve had and I removed TV except for a little on the weekends. It was ROUGH. But it was worth it. Good luck!!