toddler play mats for floor
http://sanakirja.kronman.fi/index.php?title=How_To_Explain_Outdoor_Playmat_For_Babies_To_A_Five-year-old_88146
Take a look at your mat periodically for signs of wear, like loose threads, damaged foam. Repair or replace as required. Be sure to keep it in an area that is dry to stop the growth of mold.