Newborn: Every diaper I changed for the first three months of my sons life was poopy. That is not an exaggeration. It was always just yellow and runny and very acidic. It would burn his bottom and so we had to change him immediately and frequently. He would squirm and try and hold it in as much as he could because it would hurt him.
Baby: After he started solid foods the BMs were very large and runny and would explode out of his diaper in every place imaginable.
Toddler--no special diet: They were very acidic and would leave burns on his bottom. He would have 3-5 very large BMs every day. They were very sandy; it literally looked like he had been eating sand.
Todder--after being on a gluten-free diet: When he is not contaminated they are solid only has one a day. They do not have a strong smell. When he eats something he shouldn't they are be very large, very acidic, and very frequent. They look undigested and whole foods can be identified. They have an extremely strong and unique smell that "hovers" and does not dissipate for a long time after the diaper has been changed and taken outside.