Themes and Designs for Kids. Here are some of our kid-friendly design collections. You will see our various designs for birthdays and baptisms. Designs for tarpaulins and invitations for any occasion. You can choose from a variety of themes and designs. Such includes the popular cocomelon theme, and many others. One of the most difficult tasks I have while designing is designing for children. It requires a lot of creativity and hard work. When you come across a design, it’s not just about being cute or colorful. It’s about keeping things simple, but yet attractive to kids.