We are a pair but we have no left or right
We can be any colour, but schoolgirls need white.
You wear us in the daytime and on a winter’s night.
You ought to change us every day or we won’t’ smell nice!
1.What are we?
2.How many times a week should you change us?
I can be round , I can be square.
Put me by your bed and I will sit quietly there.
I stay quiet until the morning time.
Then I beep loudly so out of bed you climb.
1.What am I?
2.What is the noise that this thing makes?