An infant is seated in a black and olive green Cybex stroller within a public transport vehicle in Sofia, Bulgaria

An infant is seated in a black and olive green Cybex stroller within a public transport vehicle in Sofia, Bulgaria. The infant wears a brown, fuzzy, bear-ear hooded garment over a white fuzzy hat, and has a pacifier in its mouth while gripping the stroller's black bumper bar with both hands. A rainbow-striped plush toy, resembling a caterpillar, rests on the infant's lap and the bumper bar. To the left, a partially visible adult, wearing blue jeans, has a hand resting on the stroller's fabric. In the background, another passenger's back and shoulder are visible; this individual wears a dark long-sleeved shirt and has a blue backpack resting on a gray plastic seat. The vehicle's interior features gray plastic seats with integrated handles and orange vertical support poles, consistent with a tram or trolleybus operating within Sofia's urban transit system. Urban scenery is discernible through the windows.