Astroblaster
The AstroBlaster illustrates the laws of conservation of momentum and energy during the creation of a supernova (an old star, that having exhausted its nuclear fuel, collapses upon itself in less than a second). A shock wave speeds outward from the center through the collapsed material, moving faster and faster as it reaches less dense layers toward the surface, the shock wave accelerates an outermost thin layer of the collapsed star to relativistic speeds, creating 'cosmic rays' that spread throughout out the galaxy.
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