yes it is, and $30 should be plenty for the stuff to make it too.

keep in mind though that you need 2 hides--one for the warm side and one for the cool side. just use a cereal box or something like that for the second hide if you don't already have one. and also you absolutely need to get an acurite digital thermometer/hygrometer from walmart to measure your temps and humidity. really, it is a necessity. it is $15, but you should be able to buy a good size rubbermaid or sterilte for $10 which still leaves you $5 for the screen and wire ties.