Two of the UK computer museums, at least, are appealing for funds to keep them alive during this time, when they have no visitors and no events. (Any other similar appeals, please post below!)
I see the CCH has a page full of alternative ways to help, including buying a season ticket and visiting their gift shop. Want a ZXSpectrum mug or a 5¼" floppy notepad? Or maybe a set of 5 punched cards (used), or an 8" floppy, or a set of 3.5" floppies? Or a Sharp PC1211 (untested)?