I typically pack outfits per day for my 6 year old. Socks and underwear rolled or folded inside shirt and shorts, stacked inside a packing cube. Plus some extra pants and shirts in case of spills. I also pack for planning to do a larger load of laundry every 8-10 days.
I don’t have a brand recommendation but go for lightweight and I prefer the two sided kind (clean on one side, dirty on the other).