Kids bring home the greatest creations of macaroni, glitter, and finger paint. Unfortunately, the macaroni bits and glitter is soon all over the floor or eaten by the dog.
Sometimes the pieces of clipart come already installed on your computer, but usually those designs are not the best or the brightest. Nothing wrong with them, except they are not inspired designs and everybody and his brother has exactly the same ones.
Do have a professional cartoonist/graphic designer develop it for you. There are many fine nuances that go into a well-designed cartoon brand mascot. What looks good on the sketchpad may not look good when it's reduced down to fit on a business card. A cartoon brand mascot may need to look good on a computer screen, embroidered on a shirt, etched on a pen, printed on a business card or blown up on a billboard. A good designer knows how to use the proper line weights; colors and shading that reproduce and hold their integrity over a wide array of applications.