In a vibrant cartoon style, depict a young boy with tousled hair sitting forlornly on a decaying, moss-covered wooden log. His oversized sweater appears worn and tattered, highlighting his melancholic expression. He gazes down the rusty, disused train tracks that slice through the lush green forest surrounding him. Sunlight filters through the thick canopy, casting dappled patterns on the forest floor, which is dotted with small wildflowers dancing in the gentle breeze. The trees are full of life, their leaves a mix of emerald and jade hues, contrasting with the boy's sadness. Nearby, a curious squirrel watches from the branches, and colorful birds flit about, adding a sense of lively energy to the serene yet bittersweet scene. The forest is teeming with life and vibrant details, mirroring the boy's inner emotions amid the tranquil setting.