Dear Diyamondal,
Good to see that you have received many suggestions! But I've a doubt here - going by the ideas posted by few fellow members - the awards might dampen the spirit and the objective (i.e of having fun). You can never be sure how the other person will respond to it! Things which are fun for us might hurt the other. Also, these kind of awards are just based on perception- e.g. it might be your perception that this individual is always on phone (how are you going to quantify it? won't the person get offended)..You need real carefree kind of employees to enjoy this. According to me, even if this works ; it might work with young employees not older ones or senior ones.I would recommend to give away such awards only when you have complete understanding of the mindset of all employees.
Rather choose activities which are recreational / fun filled like having days like Red day etc based on colours or appreciation week or decorating one's cubicle from least used items etc.You can find many more ideas on this site itself.