  We design, simulate and experimentally characterise a reconfigurable elastic
metamaterial with beyond-nearest-neighbour (BNN) coupling. The structure is
composed from the popular British model construction system,
Meccano$^{\text{TM}}$. The Meccano$^{\text{TM}}$ metamaterial supports
backwards waves with opposite directions of phase and group velocities. We
experimentally verify three distinct configurations and acoustically infer
their spatial vibration spectra.
