One of the twins (the girl iteration) is actually something of an artist herself and wanted to see the process. I'm a mentor/cheerleader for her art. Since she mainly does pencil art, it's a medium that she could adapt to easily.
I'm betting she would make her brother do the dangerous chemicals part of the process though...
/johnny
*e-vil laughter*
Sometimes, when the sisters have a special bond with the brothers, the results can be stu PEN dous!