need a few suggestions on what to do next

my mom was going to throw an old shelf she had away, i decided to make a cage to house my two leopard geckos. i cant decide what to do next so i figured id see what you guys think i should do.

question 1:
what should i use for the flooring? i was thinking about using astro turf or that reptile carpet. i was gonna use tile but i figured they wouldnt be able to get a grip on the slick surface & wouldnt be able to catch their crickets.

question 2:
what should i do for heat? i was thinking about using wood for the sides & plexiglass or acrylic for the back & front, then use a 1ft strip of flexwatt. i dont think the flexwatt will burn or melt the acrylic but what about the plexiglass if i go that route?


http://i1216.photobucket.com/albums/...205_035836.jpg

http://i1216.photobucket.com/albums/...205_035826.jpg