19 Kids & Counting Family Step Up For Tornado Relief Effort

Josh Duggar -- the eldest Duggar child -- tells TMZ the fam spent Sunday night and all day Monday delivering supplies and clearing massive piles of debris to search for survivors in Joplin, MO.

Josh says he and 5 siblings -- John, Jana, Jill, Jessa, Joseph and Dad, Jim Bob -- decided to load up a 3 car caravan late Sunday night when they heard about the disaster in Joplin ... just one hour from their home in Arkansas.