What age group is this costume for?
Preschool and Younger
Elementary School
Middle School

Estimated time required to make this costume:
A couple hours, some shopping

Difficulty level:
Almost as easy - some sewing

Items you will need: (Hit your return key to start a new line)
Black sweatsuit
Red and white striped floppy top hat
White Keds shoes
Black face paint
Wide red ribbon
White gloves
Soft white material
Cat tail

Instructions:
Sew (or iron if you can get that kind of material) an oval shaped piece of the white material onto the front of the black sweatshirt.
Sew the cat tail to the back of the sweatpants.
Get dressed.
Tie the red ribbon into a tight, but drooping bow at the base of the neck.
Put on sweatsuit, gloves, and shoes.
Paint a black nose and whiskers.
Put on the hat.

Other information to consider:
You may want to paint your face with a white base, but then it doesn't look as good.
Talk in rhyme.