You might want to try visiting the ground floor of 999 or 168. They have a lot of artsy stuff inlcuding materials for DIY which you can buy in bulk (with more discounts than retail purchase) especially if you are working on a larger area like your baby's play corner. If you don't want to travel far, you can also purchase assorted rubber sheets in National Bookstore. I purchased some before when I did a DIY for my nephew's birthday party. It was around 100 pesos per pack.
Promo terbesar expert care sudah dimulai, diskon hingga Rp.100.000 sedang berlangsung di shopee, ada juga voucher diskon 100% alias gratis bagi bunda yang beruntung. Buruan cek di https://shope.ee/9UfEMMqqTg (id-6690)
Try Art Friend for Rubber Mats/ Sheets.
Franccine Jachne Madrid