Once upon a time, in the green, whispery Whispering Woods, there lived a kind and clever owl named Dr. Knowheart. He wore round glasses and had warm, twinkly eyes. One sunny morning, a young calf named Niu Niu came to see him, her eyes wide with worry.

Niu Niu told Dr. Knowheart, 'Tomorrow is the big Forest Sports Day, but I'm too worried to join. What if I can't run fast or jump high?' The wise owl nodded and said, 'Let's take a walk in the woods. I know something that can help.'

They walked until they reached a clearing where the sun made patterns on the ground. 'Let's sit here,' Dr. Knowheart suggested. 'Close your eyes, take deep breaths, and listen to the sounds of the forest. This is called mindfulness meditation.'

Niu Niu breathed in the scent of pine and listened to the rustle of leaves. 'I feel a bit calmer,' she said. 'But what if my worries come back?' Dr. Knowheart smiled. 'Let me show you something else,' and with a flap of his wings, they traveled deeper into the woods.

In a cozy nook surrounded by friendly fireflies, Dr. Knowheart spoke about 'thinking in a new way.' 'Instead of saying you can't do it, say you'll do your best,' he advised. 'This is called cognitive restructuring.' The fireflies danced as if they agreed.

Niu Niu repeated, 'I'll do my best,' and noticed how the heavy feeling inside her started to lift. 'I feel lighter already!' she exclaimed. Dr. Knowheart chuckled. 'One last thing to learn before we head back,' and he led her to a stream that twinkled with magic.

By the stream, Dr. Knowheart taught Niu Niu to lie down and relax her muscles one by one. 'This relaxation technique will wash away your worries like the stream carries leaves,' he explained. Niu Niu felt her fears drift away.

The next day, Niu Niu joined the Forest Sports Day. Each time she felt worried, she remembered Dr. Knowheart's lessons. She ran as fast as she could and jumped as high as she dared, her heart filled with joy and confidence. And for the first time, she wasn't held back by her worries.