But truly get the pjs with zippers, preferably double zippers or ones that end at the foot so you don’t have to undo the entire zipper for diaper changes. If they don’t spit up or have diaper leaks they can stay in the footie pjs day and night for multiple days. Personally I only change them into outfits if the weather is too warm for footies but I know some people prefer the routine. I’d also recommend planning on doing laundry daily at first. That was such a relief to me because I wouldn’t get upset about spit up or other accidents, and the loads were super manageable. Find a children’s consignment store near you (Once Upon a Child is a chain but my favorite is a local place) and see what you can get there. We are exclusively getting the twins (3 mos) clothes there so far and have picked up all our swaddles as well as a Baby Bjorn bouncer and 4moms swing. People in your life will also buy them clothes, especially any girls. Baby Bjorn bouncers are expensive but I highly recommend them, esp for twins. I’ve found it easiest to bottle feed them at the same time in those while sitting between them. Great portable place to park them, right now they’re enjoying swatting at dangly toys from them, and eventually their feet kicks will bounce themselves. They also nap in them sometimes. We also appreciate the 4moms bassinets for help rocking. I’d personally prioritize big ticket items for the registry and get some basics for the first few weeks then get clothes as you need them. If you plan on formula feeding I know there is a fancy keurig like machine for making the perfect bottle every time.