Despite what people say, you really don't NEED to have young snakes in click clacks. I assume the best reason for being so would be to make it easier to clean and have more space. Large enclosures are fine, and MUCH easier to get a good heat gradient in.
All you need for a large enclosure is more hides and hiding places. An easy way to do this is to get some fake plants and stick them around the enclosure. It makes the snake feel secure and think it's invisible (even if it's not completely). You can also make the enclosure crowded by putting sticks, ladders and vines in there. Snakes like it.
Sorry for the shocking photos, but I can't find my good digital camera. This is the enclosure I'm using for a three month old coastal carpet python. The snake is approximately 25cm long, and to show some comparison, that's him curled up in a toilet roll that's been bent over at one side.
If you can't see, there's three hides in the enclosure. Two on the floor, and one amongst the leaves on the ladders (it's wedged in). He uses the hide in the leaves the most, and often hides in the leaves at the top where it sticks onto the glass. As you can see, he often comes out to bask on his ladder (last photo). He isn't stressed, and if you can tell by the size of his belly, eats quite well. Since I've put him in there (from a click clack), he has ceased striking as well.
As soon as the light turns off at night (the room light), he begins exploring his enclosure, then begins to bask. I've seen him out most of the night, and will retreat into a hide not long before the sun begins to penetrate the blinds.
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