If we can do it with dominoes


The 10,000 Domino Computer and some background info here


The advantage a domino computer has is great flexibility in positioning such that they can simulate signals passing through wires. (However, repeated use of circuitry doesn’t seem possible unless you use something that can stand dominoes back up after they’ve fallen.) The Turing Tumble presents a very different medium to do computations within and hence it’s an entirely different challenge to prove/achieve Turing completeness on a Turing Tumble.