I am looking for some ideas for a good way to tell my DDs, who will be 17 & 15 when baby arrives, that they will be gaining another sibling. DD1 is very easy going, and at least outwardly will probably take the news well. DD2 is a little more vocal about her feelings, and may be a little resentful. They adore their little brother, who will be 2 this spring, but they sometimes think he's a pain, understandably. I try to be conscious of not taking advantage of them to babysit too often, and when I do ask them to watch him for longer than a quick "can you keep an eye on him while I run to the bathroom?" I pay them... but still, I'm afraid that their initial thoughts about another baby will be, "oh great, more work," no matter how hard I will try to make sure it doesn't turn out that way for them.
We've been open to, if not actually TTC, having another child for a little while now, so that DS can have a similar aged sibling. Last fall I miscarried shortly after we announced the girls (and other family members). They took the news well enough (pretty much as above), and we told them by baking a cake and decorating it with the names of all three sibs and a fourth row of question marks. It was cute and we are thinking of doing something along those lines, but I'm looking for suggestions.