Hi,
It is unfortunate the misinformation out there about Bearded Dragons living in sand! With a bit of research you can easily find Bearded Dragons are not desert lizards per se. The world over the word "desert" is used in connection with rain fall amounts not sand. The areas in Austrailia where Brearded Dragons live have a very low rainfall. The Australian "deserts" make up about 18% of this continent, but a full 35% of Australia receives so little rainfall, it is classified as desert.
In their natural, Australian habitat the juvenile bearded dragon often resides in trees and will hide itself by burrowing into any holes in the trunk. When the bearded dragon reaches adulthood it remains largely on the ground, however, it will climb when it wants to bask in the sun or forage for food. Dragons need a dry habitat to live in, but need plenty of water. Wild Dragons get the majority of their water from licking the dew off plants in the morning. A good number of these lizards can be found in scrub, open woodland areas, and rocks on which they can bask or burrow under to protect themselves from the cold nights common to desert areas. They will also use the edges of the rocks when they need to shed their skin.
Bearded Dragons tend to be semi-arboreal, spending some of their time climbing and resting in trees. As they mature and get older, they tend to stay on the ground, climbing branches only to bask in the sunlight.
Bearded Dragons do not live in a sandy desert. There would be no trees to climb and bask in, no scrub, no rocks or plants to lick dew from.
Amanda