On Saturday afternoon, Yuna worked at the Sunflower Cafe.

The cafe was bright, but it was also very busy.

A small robot named Piko helped her carry drinks. Piko could move fast, but it did not understand jokes.

"Table three needs lemonade," Yuna said.

Piko lifted two glasses. "Lemonade is moving," it said.

Yuna laughed. "People usually say, 'I'm taking the lemonade.'"

Piko stopped. "Thank you. I will sound more human."

A boy at table three looked sad. His cake had fallen on the plate like a small mountain.

Piko rolled to him and said, "Your mountain looks delicious."

The boy blinked. Then he laughed for the first time.

Yuna saw it and smiled. Maybe Piko did not need perfect human words.

Soon, a woman spilled water near the door. Piko tried to help, but its wheels slipped.

It spun in a slow circle, holding one lemon slice like a tiny flag.

Everyone in the cafe laughed, but no one was mean.

Yuna put a towel under Piko's wheels. "Are you broken?" she asked.

"No," Piko said. "I am learning comedy."

At closing time, Yuna wrote a new note on the menu board: Today's special helper: Piko.

Piko looked at the sign. Its screen showed a small sunflower.

"Do I get a break?" it asked.

Yuna gave it a glass of lemonade with no ice.

"Robots can't drink," Piko said.

"I know," Yuna said. "It just looks good beside you."

Piko's screen smiled brighter than the cafe lights.