With Ds1 we had just bought a house and the first thing we did before anyone saw it was decorate the nursery. When our parents came to see the house for the first time, we closed the door and said there was a surprise in there for them.
With Ds2, we got Ds1 a shirt that said only child with an x through it and big brother underneath. We too his picture in it and used it for his upcoming birthday party invites. It backfired a bit since my aunt got the mail and figured it out before my moms even got delivered. Oops!
Wife to Nick since 7.2.05, Mom to Cameron Nicholas since 10.16.06 & Dominic Adam 4.7.09 and Lucius Robert 10.2.14