documentclass[tikz]{standalone}
usetikzlibrary{positioning}
begin{document}
begin{tikzpicture}[>=latex]
node[draw] (1) {Blah blah level 1};
node[draw,below left=1cm and 2cm of 1.south] (2-1) {Level 2 first thing};
node[draw,below right=1cm and 2cm of 1.south] (2-2) {Level 2 second thing};
draw[->] (1) -- (2-1);
draw[->] (1) -- (2-2);
end{tikzpicture}
end{document}