High Quality Content by WIKIPEDIA articles! Various methods of baby transport have been used across different cultures and periods and for different ages of child. Methods can be divided between wheeled devices including carrycots (North American English baby carriages) and pushchairs (North American English strollers); also into slings and backpacks, baskets, infant car seats and bicycle carriers. The larger and heavier perambulators or prams, which had become popular during the Victorian era, were replaced by lighter and more flexible designs during the latter half of the 1900s.