Helsinki has a computer game museum, basically some guy had a personal collection and then donations started rolling in… Haven’t actually managed to visit it (I am so ashamed), but there are hundreds of of old home computers, gaming consoles, calculators, PDAs…
The site is in Finnish (https://www.tietokonemuseo.net/), but the lists of hardware are extensive and have short summaries in English behind a click
pictures - https://www.tietokonemuseo.net/helsingin-tietokonemuseo-pelikonsolimuseo/
computers - https://www.tietokonemuseo.net/tietokoneita/
consoles and handhelds - https://www.tietokonemuseo.net/pelikoneita/
PDAs and calculators - https://www.tietokonemuseo.net/pdat-ja-laskimet/
[Added] Sadly the space they found is not great, an electronics retailer lets them use one lobby area, so they cannot display all they have got, not even close.