You can find ideas for games, food, favors, etc. on many websites, including this one- http://www.babyshower101.com/. If you have a theme in mind, you can look up specific ideas that would work for it.
This website that you have listed is not the place for Halloween party ideas. You would be more interested in party city or seasonal Halloween stores for the best product and deals.
There are many things to do for fun at bridal showers. I would say to have some games for everyone to participate in. For more ideas you can visit the bridal shower website.
You can find baby shower ideas for a baby boy in different places. Books are a great reference, party stores, and even event planning services would provide ideas of plates around a baby shower theme for a baby boy.
i would use the party city store or website they always have great stuff to choose from. there stuff is also priced good and they also have great ideas for parties and it would be plenty of fun for everyone thats at the party.
Typically boy baby showers are done in blue. Bright colors such as red and green would be fun, but you can always choose different colors (yes, more than one is good too!) This website lists great color coordination ideas: http://www.baby-shower-ideas-galore.com/boy-shower-ideas.html
You could hire somebody to come up with ideas for you, but it would be much more cost effective to visit a website.
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 great ideas would be to have them renew their vows and to have live music. Live music is always fun.
Some cheap baby shower party favors would be bubblegum cigars, streamers, pacifiers and its a boy/its a girl confetti.
I would investigate bridal shops in your area for ideas. Most wedding planners can direct you to the best games and ideas around and can offer you prices that may help determine what you want in a shower.
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/
Rubber duckies would be a must, you can plan party games with them. At the party city web site (http://www.partycity.com) you can find a wide variety of duck themed supplies such as banners, table clothes and favors.