Hi all, What's the best rope thickness to build some DIY toys? I came across these two, but I am not sure which size to pick: https://www.amazon.com/Original-Natural-Cotton-Rope-Available/dp/B073PCCHDV https://www.amazon.com/Twisted-Sisal-Rope-inch-Scratching/dp/B01JTT61YG/ Also, which...