Simplify the following text for a Grade 4 native English-speaking person.
Original: In addition , Nintendo also developed and released a similar version of the DS . Known as the `` DS Lite '' , it was first released on March 2 , 2006 in Japan , and June 11 , 2006 in North America .
Simplified: The Nintendo DS Lite was released on June 11 , 2006 , for US$ 129.99 in the United States , and CA$ 149.99 in Canada .