There are many threads on this topic within this forum and I have written a blog on this subject, so you may find a search of the site worth your while.
A few ideas off the top of my head:
Assign presentations or case studies to students to complete during post-conference. This is one strategy I am trying this semester, with our "Child Health Assessment and Care Map" assignment. Instead of the students turning in written work (which they often did poorly), I am transforming this assignment into a presentation and learning experience for the entire group of students in my clinical group. We will also go over the student's care map as a group and make suggestions for improvements.
Invite speakers from your floor or unit. I often invite the Pediatric Hematology/Oncology Clinical Nurse Specialist, the Lactation Specialist Nurse, the Pediatric Nurse Case Manager, the Child Life Specialist and others to visit our post conferences. Even though you are new to the unit, you can ask around. You may be surprised at the readiness and willingness of some to come visit and share their expertise with the nursing students.
Go over some nursing skills, such as how to access a MicKey button or flush a PICC line (it helps if you actually have an old one for the students to practice one), how to figure the 24 hour and hourly fluid requirements of a patient, how to accurately plot anthropometric data on growth charts and what the placement on the chart signifies, or working on nursing diagnoses and a careplan or care map for a patient on the unit as a group.
Hope this helps! Keep us posted on how it goes for you as the semester progresses