\usetikzlibrary{mindmap,shapes.geometric,snakes}
% Below redefines that thingy
\makeatletter
\tikzset{circle connection bar/.style={
to path={
\pgfextra{%
\tikz@lib@mindmap@check{\tikztostart}%
\tikz@compute@circle@radii\tikz@compute@segmentamplitude%
}
[every circle connection bar]
decorate [snake]
{ -- (\tikztotarget) \tikztonodes}
},
append after command={[draw=\tikz@concept@color]}
}}
\makeatother
%===================
\begin{tikzpicture}
[root concept/.append style={concept color=blue!80},