There's no need to worry about skill or technique if you're drawing for pleasure. But, I'll offer advice where it is sought.

[He's actually had fun seeing what the children come up with, and offering them guidance. They have a kind of uninhibited creativity and spontaneity lacked by most adults, and it's keeping them preoccupied, besides.

He takes the little girl back to the rest of the group, and though he doesn't have much left by way of materials, he does have a sketchbook left and some pencils to offer Komaeda.]

Here. If you wish for colours and paints, you'll have to ask the children nicely to share with you.