My go to appetizer is veggie pizza. Yum! It's relatively easy and you can customize it to your tastes. I take 2 tubes of crescent rolls (or the new ones that are all one sheet, not perforated into triangles, if I can find them) and press them into a large baking sheet, then bake until golden. For the "sauce" I mix 2 bricks of cream cheese (I get the 1/3 less fat... fat free does not work well in this recipe btw) and 1 cup of light mayo (or reg if you prefer) with 1 envelope of dry ranch dressing mix and then spread over the crust once it is cooled completely. Then top with shredded sharp cheddar cheese, grape tomatoes, broccoli, cauliflower, carrots, cucumbers, and whatever other veggies you like, all cut up into tiny pieces. Sometimes I also sprinkle with real bacon bits.
You could also do different flavors of hummus, with pita bread cut into triangles and veggie sticks for dipping.
Your favor idea sounds cute and simple. I would try to find some cookie cutters in baby themed shapes and decorate with pink or blue icing, if you are making them yourself. Or you could buy some cute decorated cookies from a bakery.