A nice thing to incorporate is to give each child the task of lighting a candle for their Saint at the start of class on his/her nameday, before opening prayers. I used to have them hold a long candle which I'd then light it with a match, then I'd guide them to light the votive under the saint's icon with the longer candle. Made a production out of it, but it helped them feel special and lent some solemnity to the occasion
Also, what we used to do is have icon albums. We'd print a small icon with a prayer to the nameday Saint on the reverse, then laminate it. The kids would look forward to receiving an icon each week, and repeating the prayer on the back. It was a good way to keep them excited about coming to class.
We'd also print off a larger version of the icon and tell the story of the Saint while pointing out the elements of the icon that refer to the story. This helped them to become more "literate" with iconographic symbols.
Sometimes we would teach them a song about the Saint. Gigi Shahid has some great CDs (you should be able to find her CDs for sale if you Google her name).
You can roll these smaller suggestions into the "acting it out" idea... or not! Good luck