What Am I?

United States
April 22, 2007 3:16pm CST
What goes up, but at the same time goes down, up to the sky and down to the ground, my present tense and my past tense too, lets go for a ride just me and you...what am i?
1 person likes this
1 response
kamran12
@kamran12 (5526)
• Pakistan
22 Apr 07
I really love to go to kids playing places with my nephews and just how cute kids look on "a see-saw", giggling and sometimes a little frightened:-)
1 person likes this