Simplify the following text for a Grade 7 native English-speaking person.
Original: The 2010s , pronounced `` twenty-tens '' , `` two thousand ( and ) tens '' , or simply `` the tens '' , is the current decade which began on January 1 , 2010 and will end on December 31 , 2019 .
Simplified: The 2010s , pronounced `` twenty-tens '' , `` two thousand ( and ) tens '' , or simply `` the Tens '' , is the second decade of the 21st century . It began on January 1 , 2010 and will end on December 31 , 2019 .