Sorry for the late response!
How's the baby? Sorry for the late response. I'll pass along my experience for future reference.
For his size I'd have him on papertowel so you can mist him well daily. They're semi-desert lizards but because of the small size they can dry out or over heat easily, so babies up to sub-adults should be misted every morning. Twice a day with babies on hot days. Misting slowly getting them licking the mist, continue for a few minutes.
If it's been hot and he hasn't drank, and you see him looking up, and a little to the side, which can sometimes be acompanied by the rolling or imbalance you mentioned, he could have gotten over-heated. If severely over-heated and not caught in time, he may not survive. Angie is right they get neurological disorders.
If you catch it in time, immediately remove any waterbowls because they always end up in it and drown because of the imbalance. If your not in a position to bring him to a vet, you can work on rehydrating him by using papertowel, misting the whole tank and him with warm water to get him breathing in the mist, and hopefully he'll lick it as well.
If you have liquid vitamin spray. Normally it's to be sprayed on food, but in this instance with the small size, you can put some in a dropper mixed with water, and after he's licking the water, give him just a drop of diluted vitamins, once a day for just 2-3 days.
Main thing is to rehydrate him without drowning him and you don't want to get anything in his lungs.
And concerning Calci-sand, it's very dehydrating. It actually clings to the beardie and makes a hard shell, absorbing moisture, and many times I've had to take in a beardie that became dehydrated, and stopped growing and eating. I'd have to soak it daily for a month to get it to shed and grow again.
Keep us updated!
