Summary of Lulu's Sunday:
- Lulu's favorite day is Sunday.
- She wakes up at 10 o'clock and has breakfast.
- She visits her grandma and grandpa.
- At 1 o'clock, she comes home for lunch with her family.
- In the afternoon, she watches a video or listens to music.
- At 6 o'clock, it's time for supper.
- In the evening, she plays games with Chuckles.
- At 9 o'clock, Lulu goes to bed.
Answer: Sundays are happy days for Lulu because she gets up early and enjoys various activities throughout the day.