Karl is looking at a bright yellow ball with curiosity and wonder. His deep blue eyes are wide and full of enthusiasm, and his mouth is curved upward into a beaming smile. His small hands are raised and cupped in delight, as if he can hardly believe what he is seeing. The ball bounces and rolls around the room in front of him, providing a magical sort of entertainment. For coloring this picture, you could use warm yellow for the ball, deep blue for Karl's eyes and rosy pink for his cheeks. Use a gentle, warm brown for his hair, and add some shading for his clothes to create a realistic effect. The surrounding background can be a bright and cheerful shade of blues and greens.