Answer:
Don't do this in the shallow end.
I'm tall in the morning and short in the noon. I disappear at night but I will be back soon.
I hide but my head is outside.
The sharp slim blade, that cuts the wind.
Without this, eating food and Steven Spielberg's career would be very different.
I have two eyes in the front and a lot of eyes on my tail
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?