Please correct my sentences.

Great job, Terry. Please review the edited sentences below :)

Today is the mid-point of the week.
The pet store asks, "how big he can get?"
Puppies especially like to chew on everything.
I stayed in my bed all day.
It's a good lesson and good for kids, even though it can be sad when they die.
You know, it helps to teach us about life. It can make us strong.

My turtle grows fast day by day.
I am worrying about changing the turtle's cage to a bigger one.
Kids easily make a mess out of the room.