Tell me if this poem is written for children, teens and young adults, or adults:

Underneath my outside face
There's a face that none can see.
A little less smiley,
A little less sure,
But a whole lot more like me
The poem mentioned 'smiling' and 'sure,' which are typically words used to describe children. Additionally, the poem mentions a 'face' that 'none can see,' which is typically a trait of children who may not always be aware of their true emotions. Therefore, the poem is typically written for children.