What age group is this costume for?
Preschool and Younger

Estimated time required to make this costume:
Less than 1 hour (If shopping is done!)

Difficulty level:
Quick and easy - no sewing required

Items you will need: (Hit your return key to start a new line)
Spider-Man Underoos (shirt & underwear set)
Blue thermal underwear or Blue long sleeve shirt & pants
Red hat (optional)
Makeup: Black pencil liner, red & white face makeup (preferably water based for easy cleanup and less smudging)

Instructions:
Simply dress child in blue thermals, and put the red Spiderman shirt (from Underoo package) on top. This creates the basic design of Spider-Man's red and blue outfit. Using thermals will be warm in cold weather, too! All that is left is using the red and white makeup to draw on Spidey's 'mask' and use the black pencil liner for the web lines. A red hat (optional) can complete the look if it is cold outside.

Other information to consider:
There are Spider-Man costumes to buy, but not for small children, (3-5 yrs) and this can work well. I chose makeup instead of a mask because of the young age, it provides unrestricted vision and breathing.