Fin's current teacher returned from maternity leave as he first term teacher left to have her baby. Having knitted the baby surprise jacket I had a lot of the Drops Fabel yarn left over so decided to knit a sweater for the little lad.
He is now 6 months old, so I needed to knit something both age and season appropriate. The pattern is a free pattern from an Australian company called Carnival yarns. Edited April 2012: Link to the pattern is no longer active but it would be fairly easy to improvise a hooded vest if you are looking to create something similar.
I didn't make any changes to the pattern - just knitted it at a smaller gauge. I really like the pattern and may have to try to make one in worsted to get a larger garment. This used 2 balls of the Drops Fabel sock yarn. I used 2.5mm needles and got about 6 stitches to the inch.