Summarize this article in one sentence.
You'll need to pack a diaper bag. When you do so, bring more diapers than you think you'll need you never know when your baby will decide to make life inconvenient. Make sure you have wet wipes as well, and a towel or blanket to use for a changing surface. Towels and blankets can do double-duty as coverings if your baby decides to nap at the party. If you breastfeed exclusively, consider bringing a blanket to help you feed your baby discreetly. If your infant drinks formula, bring it along with bottles and nipples. Slings can be fantastic because they let you keep your hands free even as you hold your baby close. If your infant is comfortable in a sling, take it along! If the party is outside (or someplace with plenty of room), bring your stroller. Your infant can sleep in it if he or she gets tired, and it works as a good, familiar place to set your baby in the unfamiliar environment of a birthday party. Be prepared for diaper-related accidents, spitting up, and other miscellaneous infant messiness. Bring a fresh set of clothes for yourself and your infant. If this will be the first time many people will see your baby, you may want to pick extra special clothes for the occasion, but don't choose anything to fussy or difficult, as that will make changes unnecessarily complicated.
Bring plenty of diapers, wipes, blankets, and towels. Pack feeding supplies. Consider a sling. Take a stroller. Bring extra clothes for you and your baby.