Ok, I don't have children but I raised someone elses for 7yrs...including a set of twins. 5 kids all under the age of 6!! DIAPERS many, many, diapers. And Onesies lots of them! As for baby clothes I always bought them bigger and tried to plan ahead as to what the season was going to be like when they would be that size. Pacifiers, bottles, nipples, thermometers, teething toys (3 of the boys cut their first teeth by 3months!) Film for the camera.....Some other really nice stuff is stuff for the Mommie....Babysitting coupons, A trip to a Salon/Spa, Friends cooking dinner for a night, Etc.... And if there are siblings, especially younger it's always nice to include them too, a small gift or outing so that they don't forget they are special too.