Sing in a silly voice or speak the wrong words of a song the child knows to elicit laughter. Ask for a high five and keep pulling your hand up so the child smiles and the photographer captures it. To engage kids with the camera, keep asking questions about things they love. It will make the child follow your gaze and look wherever you are looking. You may also make fun, unexpected noises to make the child curious and look in different directions to get some clues.