Children playing with old bath toys and squirting the contents over themselves , now admittedly that is the fun part as well as floating ducks. But the squirted water is a possible source of infections.
Do YOUR toys have black growths inside?
https://www.nature.com/articles/s41522-018-0050-9
There are many articles in the newsmedia
ABC news https://ab.co/2DZW1M2Manage
or
https://medicalxpress.com/news/2018-03-ugly-ducklingsbiofilms-toys.html
Some reference to clean bath toys and remove mould