Try searching on Google Images and filter the results by usage rights. That way, you can find cartoon brushing hair clipart that's available for your specific needs. Also, check out DeviantArt, as many artists share their creations there.
Well, for cartoon hair brushing, first, consider the texture and length of the hair. Use light and smooth strokes to give it a natural look. Also, pay attention to the highlights and shadows to add depth.
Maybe they want to look nice or get ready for something special.
The clipart usually shows cute characters with big smiles while brushing their teeth. It might have colorful toothbrushes and toothpaste tubes too.
First, sketch the basic shape of the character's head and body. Then, draw the outline of the hair and show the movement of the brush. Add details like hair texture and expression on the character's face.
You could start by showing the child standing in front of a mirror with a brush in hand. Maybe add some expressions of concentration or frustration on their face.
Maybe he wants to look neat and presentable.
Maybe he wants to look neat and tidy.
The style could be cute and simple, with soft lines and bright colors.
The cartoon might be getting ready for a special event or just trying to look nice.
You could start by designing unique characters with different hairstyles. Add some fun expressions and background details to make it engaging.