A nearly 11-month-old male kangaroo joey who recently emerged from his mother’s pouch, has been exploring his new surroundings at Brookfield Zoo’s Australia House exhibit. | Jim Schulz/Chicago Zoological Society

Kangaroo moms, Sheila, 11, (left) and Daisy, 7½, with their joeys. The joeys were born on February 20 and March 13 of last year and have only recently emerged from the pouches to explore their new surroundings at Brookfield Zoo’s Australia House exhibit. | Jim Schulz/Chicago Zoological Society

Ten- and 11-month-old kangaroo joeys poke their heads out of their mothers’ pouches. | Jim Schulz/Chicago Zoological Society

A nearly 11-month-old male kangaroo joey checks out the visitors watching him at Brookfield Zoo’s Australia House exhibit. | Jim Schulz/Chicago Zoological Society

A nearly 11-month-old male kangaroo joey who recently emerged from his mother’s pouch, has been exploring his new surroundings at Brookfield Zoo’s Australia House exhibit. | Jim Schulz/Chicago Zoological Society

At birth, the joey is at a very underdeveloped stage and is about the size of a jellybean. | Jim Schulz/Chicago Zoological Society

When born, the baby marsupial crawled up and into his mother’s pouch without any assistance and then attached himself to a teat, where he remained for many months to grow and develop. | Jim Schulz/Chicago Zoological Society

As he grows, he obviously will be too big to fit in the pouch but will still stick his head in to nurse until he is about 18 months of age. | Jim Schulz/Chicago Zoological Society