What  Starts with F and ends with K
    A  first-grade teacher, Ms. Brooks, was having trouble with one  of
    her  students
The teacher asked, 'Harry,  what's your problem?'
Harry  answered, 'I'm  too smart for the 1st grade. My sister is  in
    the  3rd grade and I'm smarter  Than she is! I think I should be in
    the  3rd grade too!'
    Ms.  Brooks had had enough. She took Harry to the principal's  office.
While  Harry waited in the outer office, the teacher explained to the  principal what The situation was. The principal told Ms. Brooks he  would give the boy a test. If he failed to answer any of his  questions he was to go back to the 1st grade and behave. 
She  agreed.
Harry was brought in and the conditions were explained  to him and heagreed  to take the test.

Principal: 
'What  is 3 x 3?'
Harry: 
'9.' 
Principal: 
'What is  6 x 6?'
Harry: 
'36.'

And  so it went with every question the principal thought a  3rd
    grader  should know. The principal looks at Ms. Brooks and tells her, 
'I  think Harry can go to the 3rd grade.'

Ms.  Brooks says to the principal,
'Let  me ask him some questions.'
The  principal and Harry both agreed.

Ms.  Brooks asks, 'What  does a cow have four of that I have  only
    two  of?'
Harry,  after a moment: 'Legs.'
Ms  Brooks: 'What  is in your pants that you have but I do not have?' 

The  principal wondered why would she ask such a  question!

Harry  replied: 'Pockets.'

Ms.  Brooks: 'What  does a dog do that a man steps  into?'

Harry:  'Pants.'

Ms.  Brooks: What  starts with a C, ends with a T, is hairy and  oval' 

Harry:  'Coconut..'

The  principal sat forward with his mouth hanging open.

Ms.  Brooks:
'What  goes in hard and pink then comes out soft and  sticky?'

The  principal's eyes opened really wide and before he could  stop
    the  answer, Harry replied, 'Bubblegum.' 

Ms.  Brooks: 'What  does a man do standing up, a woman does
    sitting  down and a dog  Does on three legs?'

Harry:  'Shake  hands.'

The  principal was trembling.

Ms.  Brooks: 'What  word starts with an 'F' and ends in 'K' that means a lot of heat  and excitement?'

Harry:  'Firetruck.'

The  principal breathed a sigh of relief and told the  teacher,
'Put  Harry in the fifth-grade,...................... I got the last  seven questions wrong......'