So, plan a half day where you pair up employees. Once paired, one employee explains to his (or her) partner what he does in a “typical” day. Allow enough time for sharing samples of his work and for Q&A. Then, it's the second person's turn to share about their “typical” day. If your half day is a morning, suggest the pairs of employees have lunch together, where they can finish by incorporating more discussion about away-from-work hobbies and interests.
Schedule your job learning days for once a month and have your employees meet with different partners each time. It's best when they meet in their respective offices/cubicles.
Activities like these help your team to bond. Plus, they often generate some creative idea sharing that can boost productivity. Odds are as well that most employees will learn that their co-workers' jobs are more difficult than they might have originally thought. That knowledge builds greater mutual respect, which is vital to a team's success.