I gave them only 1 coloring page each. The eldest (3,5 years old -- 44 months old) took Lightning McQueen (Cars) coloring page while for the youngest (20 months old), I gave him a cute kitten coloring page.
And these are the result :)
I'm a very proud mom ^^
PS: They are using Titi Crayon Pencil -12 colors (made in Korea) that is claimed to be: non-toxic, vivid&various range of color, brilliant colors.