Gift giving was common, similar to Christmas. Cerei, wax candles, were common gifts, as were sigillaria, small figurines made of wax or clay. Gag gifts were also commonly given out. Children often received toys and gifts were sometimes accompanied by poetry, similar to the modern day Christmas card.
Slaves did not have to work on Saturnalia. In fact, they were allowed to participate in the traditions. Often times, slaves sat at the head of the table and were served by, or dined with, their masters in a reversal of the traditional social roles. Saturnalia as a whole was seen as a time of freedom for both the slaves and free, although this was only temporary, and this tradition was no threat to the traditional Roman social hierarchy.
So, the next time the holidays are on your mind, remember part of the origins of Christmas, and consider having a Saturnalia party with your Latin Club!