I built a "burrow" with 6 concrete bricks and a ceramic tile( 1foot by 2 foot). Lay bricks in a rectangle so the inside space is 4 to 6 in. wide. Adjust for your snakes size. Length about 16 to 18 inches. The length lets them thermoregulate without leaving the hide!! Put the tile on top and you're done. Add substrate up to the tile so they crawl down to the hide. Adjust as your snake grows. I have ap t 10 and t25. Both my snakes use these readily and both are more confident as a result.