Sewing is definitely the best option, but you can also try fabric glue, hot glue, and, though less sophisticated, but an effective option, staples.
Needle and thread...
Try felt material and hot glue.
You can create your child's costume with out being an amazing sewing machine. Here is a great article on how to create a fire fighter costume with out sewing. http://stopdropandblog.com/2009/10/13/how-to-make-a-sew-free-firefighter-costume/
See the links below:
Easy,get some Fabric,and start Sewing.
A Sewing Machine And Cloth And Maybe Markers.
Sewing machines are very heavy. As such, there is no such thing as a portable sewing machine.
There are several princess costume patterns in the Halloween McCall's patterns. They have a variety of choices depending on what your sewing experience is.
You can make a Geico Gecko costume by sewing green felt together. Sew this felt into the shape of a lizard's body.
pink and silver fabric and a sewing machine
Well you basically get some materials after annaylising the costume and then just finally make the costume. If you are not very good with sewing and other stuff like that try getting a ready made costume from a costume shop. Just ask peopple.
Making costumes can be fun. A person can buy the fabric, and a pattern for the character, and make it by sewing, or they can pick up parts of the costume from various stores.