I don't think there are any baby shower games that involve candy wrappers, but you CAN find personalized candy wrappers. They would make great invitations or party favors for your guests.
There is the baby diaper game, you put semi melted (fun size) candy bars into a diaper and each guest has to taste and write down what candy they think it is.
Unique baby shower game ideas can be found on many websites, such as The Bump, Baby Center, and Parenting. Some examples of games are "Don't Say Baby" and guessing the pregnant mother's belly circumference.
One easy baby shower game is to have each guest cut a length of string according to how many inches around the mother's stomach is. Whoever guesses closest should get a prize. Another easy game is to melt different kinds of candy bars in diapers to resemble baby poop and have the guests try to guess what candy bars they are.
There are many baby shower games to play for instance Dirty Diaper Game, Baby Lotto, Clothespin Game, Scratch off Game.
A great game for a baby shower is called "Smelly Diaper" and involves melting different chocolate candies in the crotch of separate diapers and having attendants smell or taste the chocolate to guess what candy bar it is! This game will provide great laughs for everyone and great pictures!
The best baby shower game ever made is "Guess Who's Baby". The game involves pictures of babies and coupled parents, in which you have to guess their rightful relationship. "That's their baby!". It's such a fun and funny game.
Some of my favorite baby shower games have been the Nursery Rhyme game and the diaper pin game. Here is a link to a website with some more ideas:www.babyshower101.com/
One of the best books is fairly descriptive of the contents, and is named "Baby Shower Game Book". It contains some of the best and most popular games, and can be found at http://www.celebrateexpress.com/Baby-Shower-Game-Book/30747/PartyItemDetail.aspx
I've thrown several baby showers in the past. Some of the gifts I've given out are wine openers, gift cards, soaps, lotion, candy, alcohol is always a winner.
Pea Baby Shower is adorable Sweet Pea in a Pod Baby Shower Theme Idea is sure to be a hit! Sweet Pea invitations, sweet pea bath bomb favors and even sweet pea surprise baby shower game!
Although I couldn't find a specific baby shower party idea book, there is a baby shower game idea book here: http://www.amazon.com/Best-Shower-Party-Games-Activities/dp/0671576054