Transform the elements of the periodic table into characters

I am a high school science teacher and I would like to transform the elements of the periodic table in characters (my main character is hydrogen, a small kid who needs to carry a heavy metal ball in order not to fly away). Each element is different but all of them have one orbit around them that represents the number of electrons in the outer shell (sorry I would like to make it realistic). I was thinking about the character and because my target are kids, I would like the characters to look "cute" but not necessary "chibis" with huge eyes and heads. I have some images on my head but not very clear that is why I am not very sure which designer I need for my idea. Obviously I would need the characters for comercial purpose and I need to own the copyright