Simplify the following text for a Grade 7 native English-speaking person.
Original: The Nintendo DSi is a handheld game system created by Nintendo and released between 2008 and 2009 in Japan , Australasia , Europe , North America , China and other regions through various distributors .
Simplified: The Nintendo DSi is the third version of the Nintendo DS handheld . It was first available in Japan in December 2008 , and in other regions in April 2009 .