Great news for you,
Teacher Watson, to be a wanted person!
*giggles* ............make them do a horse!
Seriously, probably a flower is the safe bet for most people.
Unless you want to complicate things a bit and offer a choice of a flower or some sort of animal?
People do like choices!!!
Just thinking a bit further here .... that would mean you would have to deal with eyes/faces and that could be a bit more of a challenge. Maybe that'd be better for the advanced class? Got to keep planning how to keep yourself in business!!!!