So imagine you want to draw a picture or make a cool poster. You could use crayons or markers or paint, but sometimes it's hard to make everything look just right. That's where a design tool comes in.
A design tool is like a special computer program that helps you make really nice pictures and posters. It has lots of buttons and options that let you change the colors and shapes and sizes of everything you're making.
It's kind of like having a super fancy pack of markers that can do more things than just make lines. With a design tool, you can make curved lines and straight lines and dotted lines and even make letters and numbers all different colors and styles.
Plus, you can take pictures from the internet and put them into your design, or use special shapes that the design tool gives you. You can even add special effects, like making your picture look like it's on fire or making letters look like they're made of gold.
So basically, a design tool is a special program that helps you make really cool pictures and posters and gives you lots of options to make everything look just right.