I have a 4-month-old and we are working on sleep training. She is mostly breastfed but takes bottles great. She wakes up about 7:40-8 a.m. and her wake windows are about 45 minutes -1. 5 hours right now. We do a lot of tummy time and play time, some dancing fruit or other shows while I try and get stuff done around the house. We go on at least one walk a day.