I definitely thought it looked like a microscopic cat walked all over the sample.

https://www.themoscowtimes.com/2023/05/11/russia-to-build-migrant-village-for-conservative-american-expats-a81101

In many cases schools are legally considered in place of parents meaning they can give certain consents for the underage attendees such as approving of search and seizures of their private property. https://www.law.cornell.edu/wex/in_loco_parentis