Please give good first finger food ideas for my 6 1/2 month old.?

The first food we tried with my son (at 6 months old) was a whole banana. It was messy but he did a great job with eating it. Other foods we tried soon after included sliced avocado, steamed broccoli, steamed cauliflower, steamed carrot & steamed green beans. Roasting vegetables makes them soft and easy for your baby to mash up and eat. Just cut them into finger sized pieces and roast. Things like pumpkin, sweet potato, potato, squash and carrot. Generally if you cut the food into pieces that they can grab and gnaw at then that's a good guide.