mats for kids play area
https://wiki-aero.win/index.php?title=10_Things_You_Learned_In_Kindergarden_That'll_Help_You_With_Playpen_For_Babies_And_Toddlers_With_Mat
Take a look at your mat periodically for indications that wear and tear such as loose threads or damaged foam, and repair or replace the mat if required. Make sure it is stored in the dry location to stop the growth