My DS6 was the same way. He drew very early and well. When he started pre-k and there were rules attached ie "stay in the lines" draw an elephant" etc, his drawing regressed.

Now, when he draws for his own pleasure his drawings are very good for his age, but on school "art" stuff he does what he has to to get by.

Shari
Mom to DS 10, DS 11, DS 13
Ability doesn't make us, Choices do!