Abstract: An infant seat base removably retaining an infant seat having a seat forward end which a seated infant faces and for simulating the sensations of travel in a road vehicle includes at least one vibration mechanism transmitting vibration into the seat for simulating vehicle vibration from tire movement over road surface irregularities; a recorded sound storing and playing mechanism for playing the sound of a moving road vehicle to an infant in the seat; a view simulation back drop structure having the appearance of a road vehicle seat backrest secured to the base at the seat forward end; and a base circuit including a power source delivering power through the circuit to the at least one vibration mechanism and to the recorded sound storing and playing mechanism.