If you were around Wooly Bully last year at all during our afghans for Afghans campaign, then you have probably seen the Firefly sweater.  It is one that I designed specifically for people who wanted a quick & fun project to knit for a4A, while at the same time making something functional, wearable & warm.  Many people knit this sweater as their very first sweater & I think that it is a perfect project for someone looking to learn the basics of raglan sweaters. 

Firefly is a simple, top down raglan style sweater knit with a placket of seed stitch down the front. 
Knitting this sweater is a great way to use up scrap yarns by changing colors throughout for a striped look, or just at the cuffs & waist band for a varsity look.  Some people have used intarsia techniques to add interest in the placket. 
You'll need to know how to knit, purl, work in the round & on dpns (or 2 circs) and how to use place markers.  The pattern also calls for using a Make 1 increase and K2tog as well as a tiny bit of seaming under the arms. 

The small size of this sweater can be expected to fit a child 10 months to 1.5 years while the large size may fit a child 2 -3 years of age.  These are of course guesstimates.  I always encourage people who are making this sweater for a specific child, to measure their torso & arms to ensure that they make the sweater & sleeves long enough.
If you make this sweater, I'd love to see pics.  If you wish to teach this sweater in a class, just contact me for my specifications.  Thanks!