The father of the Prodigal Son called for a celebration when his son returned, and they began to make merry. If that father could go out and sulk with the elder son, and not enter into the joy and laughter of the party, then we would have a picture opposite of what Jesus gives us. He portrays this father, who represents God, as entering fully into the joy and laughter of the celebration. It can be assumed that God will do so in the eternal celebration of heaven. I link laughter to joy, because it is almost impossible to conceive of a joyous banquet, where there is no laughter.
Laughter is a part of a joyous time.
It is not likely you would call any occasion joyous, if there was no laughter. If you could sit at the marriage supper of the Lamb and never laugh, you would be able to say, this is great, but I remember a time on earth that was even greater. You can count on it, there will be no memories in heaven that recall times on earth of greater joy and laughter. If laughter is not a part of heaven, it will lack a value we all treasure in time. This can never be.