Simplify the following text for a Grade 4 native English-speaking person.
Original: In 1966 , coins were introduced in denominations of 1 , 2 , 5 , 10 , 20 and 50 cents .
Simplified: From 1966 , coins were made in amounts of 1 , 2 , 5 , 10 , 20 and 50 cents .