How can I make a mold for mosaic tiles that I can bake at home?

well.... there's this caly called, polymer, or sculpey that u can bake at home and it will harden. but its colored and it will feel like plastic. you cant just bake clay normally in ur oven. so i would just recommand getting a normal clay, then let it dry, then paint it with the color you want THEN go to an art store and buy *MOD PODGE*. its this clear liquad stuff that if you put it on clay, it looks like its has a thin layer of glass. :) its also non toxic. http://www.google.com/imgres?imgurl=http://1.bp.blogspot.com/_EeA87tI3OMs/TT2zJ894OKI/AAAAAAAAAKo/mA0UqjmV_Ug/s1600/Mod%2BPodge.jpg&imgrefurl=http://greylustergirl.blogspot.com/2011/01/custom-necklace-tutorial-and-gift-idea.html&usg=__kah7N2Lf5yxJtaClavREP6b-sCo=&h=1600&w=1195&sz=315&hl=en&start=0&zoom=1&tbnid=1i7LR9E2fVWwCM:&tbnh=137&tbnw=102&ei=LPtJTY_iKdDpgAfE0rHqDw&prev=/images%3Fq%3Dmod%2Bpodge%2Bnecklaces%26um%3D1%26hl%3Den%26biw%3D1152%26bih%3D566%26tbs%3Disch:1&um=1&itbs=1&iact=hc&vpx=501&vpy=44&dur=1326&hovh=260&hovw=194&tx=112&ty=215&oei=LPtJTY_iKdDpgAfE0rHqDw&esq=1&page=1&ndsp=18&ved=1t:429,r:2,s:0 this is the kind i have :) there are lots of choices really. more glassy ones, or none glassy.... :) either ones.