Michael Jackson's kids celebrates his birthday at his childhood home in Indiana

Today is Michael Jackson's birthday ... he would have been 54 years old ... and his kids are honoring his memory with a family trip to MJ's boyhood home in Indiana.

Prince, Paris and Blanket were spotted in Gary, Indiana yesterday ... along with their co-guardian Katherine Jackson and their aunt La Toya. TJ Jackson -- the OTHER co-guardian -- also made the trip. 

Michael will be honored at the annual "Goin Back to Indiana" celebration in Gary ... which kicks off tonight with a candlelight vigil in front of MJ's childhood home.

The kids are also expected to throw out the first pitch at a Gary SouthShore RailCats baseball game this week.
Michael died on June 25, 2009. He was 50.


Source: TMZ