Drawing a baby by achieving realistic skin tones requires careful observation and a nuanced approach. Start by studying the various undertones and hues present in a baby's skin, such as warm pinks, subtle yellows, and delicate peach tones. Layering different shades of these colors can help create depth and a lifelike appearance. Use soft, gradual transitions to blend the colors smoothly and avoid harsh lines. Remember to consider the lighting conditions in your drawing and adjust the shading accordingly, adding darker tones in areas of shadow and lighter tones in areas of highlight. Patience and attention to detail will enable you to capture the natural beauty and realism of a baby's skin in your artwork.