Which scriptures tells us that Jesus laughed or was happy? I know that Jesus wept. Where can I find in the bible that Jesus expressed joy, laughter or happiness?
The classic book on this subject is The Humor of Christ by Elton Trueblood.  While it is true that the Scripture rarely tells Jesus' emotion, there are considerable places in Scripture where Jesus is most likely making a joke:


When the Syrophoenician woman quips back that even the dogs get the crumbs
When the Pharisees strain out the gnats but swallow a camel
When Jesus describes the Pharisees as the blind leading the blind 


Additionally, we may not have 'Jesus laughed," but we know that Jesus loved a party:


His first miracle was at a party, turning water into wine (and embarrassing Baptists ever since).
Matthew 9:15 "Jesus replied, "Do wedding guests mourn while celebrating with the groom? Of course not. But someday the groom will be taken away from them, and then they will fast." - basically telling the Pharisees to lighten up about the fact that the disciples weren't fasting.
Numerous parables about wedding feasts.  This was almost a staple of the genre.


And, finally, Jesus upbraids the Pharisees for their double-mindedness on the subject of fun in Matthew 11:16 - 19:


  To what can I compare this generation? They are like children sitting in the marketplaces and calling out to others:
  
  17“ ‘We played the pipe for you,
  and you did not dance;
  we sang a dirge,
  and you did not mourn.’
  
  18For John came neither eating nor drinking, and they say, ‘He has a demon.’ 19The Son of Man came eating and drinking, and they say, ‘Here is a glutton and a drunkard, a friend of tax collectors and sinners.’ But wisdom is proved right by her deeds.”