Answer:
What object has keys that open no locks, space but no room, and you can enter but not go in?
What goes up let's of a load and come back down
The day is their night and the night is their day, when I shout and they shout back I run away.
It goes up and down the stairs without moving.
Round and round I go never stopping in a continuous flow. I hang out with numbers each and every day and nothing ever gets on my way. What am I?
What is big and yellow and comes in the morning, to brighten mom's day?