Do gnomes or halflings look like children?

[gogogome]

I have a friend who wants his friend to join the group.

Unfortunately his friend is a... lolicon. He wants to play a child character, or at least one that looks like one.

Rather than implementing a child template from another d20 system, or making a house rule about it I was wondering if gnomes or halflings look like children so I can suggest he play one of those instead.

He is a little offensive and says he doesn't want to play midgets.