I am getting ready to help with one and we are going to do a candy bar for a favor for the guests. I have a few pics of how it's suppose to look if you are interested. Another thing I always do is buy a blank book at Michaels and decorate it with scrapbooking stickers and call it Advice for the the Mom to Be! I put it on the gift table with a little sign in a picture frame that says please provide any advice or words of wisdom for the Mom to Be. All my friends have loved their books and say they look at it from time to time when they need help. One game that is popular is I am Famous Mom! Who am I. You can make this yourself. You say things like I am an older new mom and I am on many make up commerials.
Who am I? Answer Halle Berry
You can type this up on a sheet of paper and print in on a color of the shower.
I have some more games like word scramble and the snswers I can e-mail you.
Also make sure someone is there to take pics and write down gifts and the people who gave them so you sis can have a list for her thank you cards. When I do sjowers I try and stick to the theme. If the colors are pink I try to incororate that. My last friends was two peas in a pod so we had pea salad, lime green sherbet and sprite for punch, ranch dip with celery sticks, and sandwiches from Sam's.
As for invitations I did some on Vista Print but now you can make your own if you want by using Microsoft Publisher or make flyers on colored paper.
Best place for a cake, Sam's has the best price and they are so good! If you need anymore ideas let me know. I love to do party planning!
Have a great one!