Uh...the place I got them at put them in that box but their cold so I think their fine huddled up
Usually the box they send you home with is just to get them home. When I got chicks last year they grew up in a big plastic container with wood shavings in the bottom. The food and water containers were on each side. The heat lamp was on all day for the first 5 weeks of their lives.
Keep them warm with a heat lamp, food and water containers full and make sure they have enough room to move around. Crowded chicks can get sick or injured. Oh and keep their living space clean. If they stink the bedding needs cleaned. Good luck with your chicks!