Classic Triad: abdominal pain, increased abdominal distention, constipation
Alternative Presentation: bilious vomiting, abdominal distension, tenderness, and a palpable mass
Vomiting seen in 50% of cases
Shock and peritonitis if perforated
Vomiting seen in 50% of cases
Volvulus 
Emergent
Rectal foreign body
Necrotizing Enterocolitis
Anal fissure
Volvulus
Fecal impaction
Testicular torsion