I believe that a good Halloween costume might be a character of the kid's favorite show. For example, if he likes the Power Rangers, he can dress up as his favorite one.
It'm amazing how simple a good costume can be to make! Look at http://familyfun.go.com/halloween/halloween-kids-costumes/ for some good ideas. Happy Halloween
Most boys like to be a hero for Halloween. Try Superman or Batman costumes for the boys. You can also look up costumeideazone for more ideas on what to wear for your kids. Try going to Walmart or Targets and find some costumes that they like.
Unique halloween costumes are the fun way to go. Here are some great ideas on costumes: http://www.essortment.com/halloween-costume-ideas-50-unique-weird-ideas-52253.html and http://www.halloweencostumes.com/exclusive.html.
There are tons of costumes you can do for kids that aren't scary. You can easily make or buy costumes like Farmer, Firefighter, Bag of Jelly Beans, or Fairy.
There are some good websites that have ideas for couples costumes. Sexycostumes.com has some choices for different sexy sailor costumes, plus many other ideas.
Sometimes coordinating costumes can be a great way for a couple to really express themselves on Halloween. Tandem costumes like Sid and Nancy or the Bananas in Pajamas are some creative ideas you could try.
There are many places to get costumes for a fun tim with the family. Some places are shop.ebay.com/i.html?_nkw=family+halloween+costumes and familyfun.go.com/halloween/halloween-kids-costumes
There are many great scary costumes for women! Bride of frankenstein, witch, or even a zombie are some ideas. Here, this website sells some spooky costumes for woman: http://www.frightcatalog.com/Halloween-Costumes/Womens-Costumes/Horror-Costumes/
You can go to your local store to purchase a halloween costumes. Some drug stores may include Target, Children's Place, etc. Some drugstore should also sell newborn halloween costumes.
Some excellent ideas for couple Halloween costumes include past presidents like Hillary and Bill or Bonnie and Clyde. You can get costumes at Party City or even stores like Target.
It depends on what costumes and decorations you would like to create. You can find some ideas for costumes here: http://costumeideazone.com/. As for decorations, the following site has a lot of great ideas: http://tlc.howstuffworks.com/family/halloween-decorations.htm.
Here are some ideas for women's Halloween costumes: librarian, your favorite type of candy bar, a flasher, a cat burglar, a flapper girl, or a kissing booth.