  The non-equilibrium dynamics of a one-dimensional Ising model with uniform,
short-ranged three-spin interactions is investigated. It is shown that this
model possesses an exponentially large number of metastable configurations that
are stable against single spin flips. This glass-like situation results in a
complete freezing of the system at low temperatures for times smaller than an
intrinsic time-scale, which diverges exponentially with inverse temperature.
Via thermal activation the system eventually escapes from this frozen state,
which is signals the onset of aging by domain growth.
