Tonyoh jgn tak tonyoh

Actually I am starting Farhan on drawing lesson. It has been quite some time since his last scribbles. When he found a pen, he might scribble anywhere so I hide pens and pencils, but this will never make him learn. So I read some articles on how to start a child on arts lessons and came up with providing him with large crayons and majong paper. By 3 years old, he should be able to draw a circle. How am I going to know if I do not let him draw? How would he learn if I do not let him?