Busybox is... a toybox[0] with a more restrictive license.

0. https://github.com/landley/toybox

The correct phrasing would be "Toybox is... a BusyBox with a more permissive license." BusyBox started first.

  Toybox was started in early 2006 by Rob Landley after he ended his BusyBox maintainership due to a dispute with Bruce Perens, the original creator of BusyBox.[1]