Im not sure if you have to tell them but we told ours we are expecting (we'd only been there 2 months but our real estate agent is a lady and she went all gaga when I told her haha).

As for those ebay stickers, I went looking for some and most I found were rather expensive...then I went to my local Red Dot and found wall decals (albeit rather small, each one is about hand size or abit bigger) but a sheet of about 10 stickers was $3! We got a few sheets with jungle animals, noahs ark etc, they r very cute and colorful. So next time ur in red dot ask them if they have any!