A toddler presents to the clinic with a one-day history of i…

A toddler presents to the clinic with a one-day history of intermittent, cramping abdominal pain with non-bilious vomiting. The patient is observed to scream and draw up their legs during pain episodes and becomes lethargic in between. The patient has a small amount of bloody, stool with mucous in the diaper. What is the disorder and what is the most likely age for it to occur?