Artistic ability varies so much. I do know a child (not mine!) who could have done that certainly by age 4yo, but she was very artistic.
In all honesty I wouldn't have felt I'd acquitted myself too badly doing it myself. I'm not artistic.
It's appropriate (ds' Christmas card in year 2 he draw a dinosaur with Lancaster Bombers overhead. When told by the teacher it needed to be Christmassy he added a Christmas tree and the dinosaur saying "yum"), well coloured in, and I can see what everything is meant to be!