Why are you sleepy this morning? Yesterday, Mia felt tired after lunch. She drank a big coffee. Coffee has caffeine. It helps you feel awake. Mia worked well that afternoon. But at night, sleep came late. The next morning, she felt tired again. But here is the surprise. Afternoon coffee can stay with you. It can make sleep harder at night. So Mia now drinks water after lunch. She keeps coffee for the morning. Her night is better. Her morning is brighter. A small afternoon choice can change tomorrow morning.