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!
Some good co-ed baby shower games include guessing the size of the mama with dental floss, what kind of candy is in the diaper.
Some popular baby shower games are bingo, pregnant twister, guess the sex, and other games. Many of these require no extra money and can be done with supplies you have around your house. http://www.parents.com/baby/shower/games/fun-baby-shower-games/
There are many fun and easy baby shower games. These include such favorites as: baby shower bingo, scrabble, and scramble are all great games. Enjoy these games!
There are hundreds of baby shower games. Here are some examples to help you find what suits you: www.babyshowerstuff.com/Games and www.babyshower101.com/
Some examples of good baby shower favors are personalized napkins, customized candies, and candles.
There are many different messages for baby shower invitations. Messages like, "Please attend my baby shower!" or "Hope you can make it!" are good messages.
On the webpage beau-coup.com you will find a top 20 describing the best baby shower game of the market. Another good ideas are on pages as happyhomefairy.com or hubpages.com.
The fun games to play at baby showers would involve participation from everyone. People will interact and enjoy themselves. Provide some prizes so there will be some incentives.
A unique idea for a baby shower is to celebrate the things that were popular when the baby's parents were born and to celebrate what is popular now. A good idea would be to compare and contrast how things have changed. The website below provides many baby shower games and ideas. www.babyshower101.com/
Any type of baby shower favors are good for a twin baby shower as well. Chocolates, little photo frames etc. You can find some ideas here: http://www.prettybabygifts.com/baby-shower-favors.html
I would think most games would be gender neutral at a baby shower... but you could decorate onsies with boy themes (trucks, airplanes, dinosaurs). Here is a website with some baby shower games! http://www.babyshower101.com/baby_shower_games.html
Some good themes for a Baby Boy baby shower could be easy with just blue or more creative with things like rubber Duckies,Monkeys,Prince crowns, and so on. http://www.partypail.com/boy-baby-shower-themes.html