Cake For a Baby Shower

I'm thinking about doing a cake for my sister in law since she is due this November with another boy. I haven't made a cake like this before so this should be interesting and fun. Although I think i will probably do a few practice run before that time. I do have an idea of doing a cake that looks like two or three personalized baby gifts, kind of like wrapped gift boxes on top of one another, but I know that will really be a challenge for a noob like me. I guess I better look around online and such and see what I can come up with. I never did something like this for her with her other two and wanted to something special for her at least once and try to do a baby shower for her. Hopefully it will be good turn out.