  We propose simple freeze-in models where the observed dark matter abundance
is explained via the decay of an electrically charged and/or coloured parent
particle into Feebly Interacting Massive Particles (FIMP). The parent particle
is long-lived and yields a wide variety of LHC signatures depending on its
lifetime and quantum numbers. We assess the current constraints and future high
luminosity reach of these scenarios at the LHC from searches for heavy stable
charged particles, disappearing tracks, displaced vertices and displaced
leptons. We show that the LHC constitutes a powerful probe of freeze-in dark
matter and can further provide interesting insights on the validity of vanilla
baryogenesis and leptogenesis scenarios.
