WHY?

Dear Pea,
We have arrived. This past week saw the beginning of the ever famous toddler WHY? phase. It's actually been kind of fun for me and Daddy to go all esoteric and I'm sure we'll be coming up with some more awesome answers, but here are our top 2 for now:
Daddy: Time to go to bed, it's night time
Pea: Why?
Daddy: Because the day is ending
Pea: Why?
repeat about 7 times and get to:
Daddy: because the earth rotates around the sun and spins on an access and...

Mama: Bye bye, I'm going to work now
Pea: Why?
Mama: Because I need to work
Pea: Why?
repeat about 7 times and get to:
Mama: Well, work is important for a number of reasons, it's important to have money so we can pay rent and buy clothes and food, but it's also fulfilling for me emotionally and...

Oh, yeah, this is going to be fun (and tiresome).