Answer:
What word has kst in the middle, in the beginning, and at the end?
I shrink smaller every time I take a bath.
I am a precious stone, as clear as a diamond. Though you can walk on water with my power, try to keep me, and I'll vanish in an hour. What am I?
I have a hundred legs, but cannot stand. I have a long neck, but no head. I cannot see, and I'm neat and tidy, as can be. What am I?
I make a loud noise when changing jacket. I become bigger and delicious.
I have feet on my head