There are certain classes of bugs that are really really trivial to implement if you are familiar with the codebase that make really good bugs for beginners (for instance, adding embeds--very well defined on what you do so a beginner can focus on everything else). There are other classes of bugs that are fairly trivial to implement if you are familiar with the codebase that aren't such good bugs for beginners. That's why "effort: minor" on Bugzilla could never be given out as a babydev bait list--there was no distinction.

Perhaps "effort:introductory" would be applicable here?