Interestingly IBM have made LEGO sets of various mainframes. I believe that they have been giving them away as prizes and such, there is also a few other companies with LEGO sets listed on the page as well: https://domjant.hu/bricks/

These are all just models of the cryostats and classical computer interfaces used to cool and read out from the quantum computing devices. These are not the quantum computing devices themselves.

(Before anyone starts. Yes, the read out is essential, but room temperature devices are coming to the forefront now so no the cryostat is not a compulsory part of the QC setup.)

I saw a tour take place at my facility whereby a man pointed at an empty cryostat and said "Wow, a quantum computer". None of us had the heart to tell him otherwise.