Original sentence: For example, a Sankyo music box made in the 70s played the song, as do many musical toys manufactured today.It can also be found on many musical toys made since the late 60s.The song has also been covered by many groups and is available on many children songs CDs and is considered a Children's music in many countries
Edited sentence: For example, a Sankyo music box made in the 1970s played the song, as do many musical toys manufactured today.It can also be found on many musical toys made since the late 1960s.The song has also been covered by many groups and is available on many children songs CDs and is considered as Children's music in many countries