Cartoonish Children's T-Shirt Design

I'm looking for a creative T-shirt design aimed at children. The design should be vibrant, engaging, and cartoonish.

Requirements:
- Target audience: Children
- Design style: Cartoonish
- Design elements: Cartoon characters

Ideal Skills:
- Illustration skills, specifically in cartoon art
- Experience in creating designs for children's apparel
- Ability to use design software like Adobe Illustrator or similar

Please share a portfolio showcasing similar work.