Grandparents day!

In week 10 it will be Grandparents day. I am not 100% sure that one of my grandparents will come, but if they do, here are a few questions I would like to ask them.

1. How many old people does Grandma look after at work(Grandma works at the booms retirement home in Thames)?
2. How many wheel barrows does Grandad make in a day(That's his job)?
3. When is the next time I will stay the night?
4. How long is it until their birthdays?
5. How old is Grandad?
6. Why did Grandad retire from school bus driving?
7. Did Grandma or Grandad play a sport?
8. What sort of pets did they have?
9. What are some of their hobbies?
10. What schools did they go to?
11. What are their favourite foods?
12. What was their favourite subject in school?
13. Who was their favourite school teacher?
14. Did they have a pet dinosaur?
15. Was it loud looking after four kids?
16. Do they miss the 60's?
17. How much do they normally spend on food?
18. Is Grandma happy her wish of having a big family came true?
19. Were cameras black and white when they were younger?
20. Is Grandad still not allowed to eat too much sugar?
21. But my main question is, is this list too long?