Use Appreciation board along with RnR. A word, even on an employee's small contribution, makes a significant impact to boost morale and motivate employees. Remember, even with small contributions, employees are making the project be delivered successfully and helping the organization to aim at its objectives.
To make RnR exciting, you will have to make it effective by using visual media and periodic communications. The best employees can be featured on the company's webpage, display boards, or in emails that can be sent to the group. They can be given a badge to wear, which will be floating across the workforce every time you select the best talent.