The modern day school bus was made in the 30's. Older ones in the 1880's.
Newer school buses do have seatbelts. However, it is expensive for school systems to buy all new buses every year, and most counties and districts only replace a certain number of buses each year. This means that, though newer school buses do have seatbelts, not all school buses currently in use are equipped with seatbelts.
On the Buses - film - was created in 1971.
Ipswich Buses was created in 1903.
Yellow Buses was created in 1902.
Sullivan Buses was created in 1999.
Mutiny on the Buses was created in 1972.
Courtney Buses was created in 1973.
HTL Buses was created in 1986.
On the Buses was created on 1969-02-28.
Shamrock Buses was created in 2002.
Avon Buses was created in 1985.
Jamaica Buses was created in 1933.