There are no healthy processed cereals. Any "nutrients" they have are artificially added and can actually interfere with the absorption of vitamins and minerals from good foods. The extrusion process (molding into shapes, etc.) robs it of all the good stuff.
If you are interested in finger foods, try the "Just" foods
http://www.justtomatoes.com/. Just peas, Just mixed veggies, Just blueberries, etc. They come in organic varieties as well as conventional. They are freeze dried food. Most in perfect little baby sizes.
We cut up fruits & veggies (either cooked or naturally soft) into tiny pieces. Eventually we introduced meats. DS is an exceptional eater and likes just about everything but spinach.