Abstract: A pediatric saliva collection system includes a pacifier portion, a stiffener, a collector, and a pad compression tube. The pacifier portion includes a receiver having a first interior cavity and nipple having a second interior cavity in fluid communication with the first interior cavity, the nipple including a plurality of apertures. The stiffener is insertable into the pacifier receiver, and adapted to receive the collector therein, the collector including a handle, an absorbent pad extending out from the handle and a seal; the collector removably insertable into the pacifier portion; and, the pad compression tube insertable over the collector to compress the absorbent pad and express liquid sample.