It is a great pity that your son has a fever so often.

It is my first time to know that you like painting. It's great! I like watching fine arts in a museum. But, I am not able to paint a artistic picture.

I'm not good at painting,but it is very fun. you can paint anything,like old T shirt,jeans, pot,can,wooden plate...So you can reuse many things.Last time I painted many tulips on a flower pot which was very childish picture I thought.But I gave it to my mother,and she said "Oh it's good!I'm going to put in the living room!" She likes hand made things.
And there is a few nursaries here, my 3 year old son can play with friends, and sometimes my 6 year old son can come with me and paint his thing.

Great! I remember that I read a book about the paintings in caves over 15,000 years ago, which is well-known as Lascaux and Altamira Cave paintings. I wonder how poeple wanted to paint many animals in the dark caves. But, I feld as if your mother gave me a hint for the solution of the riddle.