Art style: Children's Book.
Full-length view, the entire figure visible from head to feet, standing upright and centered — a cheerful little boy about five years old modeling correct kindergarten sports clothing. He has a round friendly face with rosy cheeks, warm light skin, bright curious brown eyes, a wide happy smile, and short tidy light-brown hair. Slim, healthy child's build with a good confident posture. He wears a clean plain white cotton short-sleeved T-shirt, comfortable navy-blue athletic shorts with an elastic waistband, short white socks, and lightweight white-and-blue lace-up sneakers with good grip. He stands in a neat, ready pose with arms slightly out, one foot forward, looking friendly and proud. The setting is a bright, cozy kindergarten gymnasium with soft-coloured play mats, wall bars and a few colourful balls in the background.
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FINAL STYLE ENFORCEMENT (this is the authoritative rendering directive — it overrides any style wording elsewhere in the prompt):
Render this image entirely in "Children's Book" style. Match the lighting grammar, material response, colour science, level of realism / stylisation, line weight, and shading model typical of "Children's Book". Keep the subject, composition, camera angle, lighting direction, and colour palette from the description above — but EVERY surface, skin, fabric, material, and environmental element must be rendered in the "Children's Book" idiom, not in any other medium.
