Well, the Psalms tell righteous men to laugh:
Psalms 52:6-7 The righteous shall see and fear, and shall laugh at him, saying, (7) "See the man who would not make God his refuge, but trusted in the abundance of his riches and sought refuge in his own destruction!"
Solomon laughs as well:
Proverbs 1:26-29 I also will laugh at your calamity; I will mock when terror strikes you, (27) when terror strikes you like a storm and your calamity comes like a whirlwind, when distress and anguish come upon you. (28 ) Then they will call upon me, but I will not answer; they will seek me diligently but will not find me. (29) Because they hated knowledge and did not choose the fear of the LORD,
God laughs too:
Psalms 2:1-4 Why do the nations rage and the peoples plot in vain? (2) The kings of the earth set themselves, and the rulers take counsel together, against the LORD and against his Anointed, saying, (3) "Let us burst their bonds apart and cast away their cords from us." (4) He who sits in the heavens laughs; the Lord holds them in derision.
Psalms 59:8 But you, O LORD, laugh at them; you hold all the nations in derision.
So, I mean, if Jesus is God, and God's followers historically have laughed, and God himself laughs, then it seems logical that laughter occurs with Christ and the disciples.