Were you invited to a shower for either of them? If so, then yes, of course. I have been invited to a dck's b-day, a dcm's wedding shower and subsequent wedding and then the baby shower. So gifts, yes. But, if not, then maybe not. The reason is, if you do this kind of thing for one, will you feel obligated to do it for all? If you plan to be a daycare provider for a long time, this could add up. However, if these families are making you feel like part of the family, then go right ahead. With some families, I might wonder then, even if I've made that gesture, will they pull their kids out of daycare anyway? If they did, I might feel insulted.