Art style: Pencil Sketch.
Full-length view, the entire figure visible from head to feet, standing upright, figure centered — a cheerful cartoon character shaped like the number 4, its bold blocky digit-body forming the torso with the open triangular gap in the middle. Sunny yellow-orange body with a friendly rounded face on the upper stroke: big bright eyes, rosy cheeks, wide happy grin. Four springy noodle-like arms and strong bendy legs sprout from the numeral, emphasizing hands and feet — one arm flexing a small muscle, another giving a thumbs-up. Hands wear soft white gloves; feet wear bouncy red-and-white sneakers with chunky soles. Energetic active pose, mid-stretch as if exercising, one leg lifted in a lively step. Setting is a bright playful gym-playground with a soft mat floor and colorful balls. No text.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
FINAL STYLE ENFORCEMENT (this is the authoritative rendering directive — it overrides any style wording elsewhere in the prompt):
Render this image entirely in "Pencil Sketch" style. Match the lighting grammar, material response, colour science, level of realism / stylisation, line weight, and shading model typical of "Pencil Sketch". 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 "Pencil Sketch" idiom, not in any other medium.
