Serious Eats - seriouseats.com

When my daughter was a toddler I didn't follow any guidelines other than "nothing too small or too big", "nothing overseasoned or spicy" and "everything well-cooked." Other than that, I just let her eat whatever she wanted. When she was on baby food, she was practically a vegetarian, preferring veggies to meat or even fruit. But when she was ready for solids, she wanted to eat whatever I was eating. So, that meant mashed potatoes, steamed veggies (blanched, really), small pieces of fish like cod, and small pieces of roasted chicken, to start. Indeed, she's 10 now and she still wants to eat what I'm eating -- which I might add is the best way I've found to introduce her to new foods or new ways of cooking/preparing what she likes already.

If you're into memorializing your kid's first meal, do it with pictures/video not food. If you overthink the food, your kid might be more into painting the walls with it than eating it.