I'm a bit concerned here. By a few things. Playsand is okay for an adult, but not for a baby or a juvie under twelve inches

Babies are cricket hoovers, you can't overfeed them if you space out the meals, 2-3 times a day as much as he will eat in ten minutes. There is an old school thinking that babies are primarily insect eaters, recent field studies in Australia show that's wrong. Babies will eat a good bit of salad. I started my 2005 hatchlings on a mush made from greens, soaked Repcal juvie beardie pellets and cricketfood.com's Da Good Stuff in a food processor with a fingers worth of water. Mush with green gravy!
I have pics of hatchlings encircling the mush and diving in!

UTH are not the best, especially if you use sand...beardies love to dig. Anyway, the point is moot, this is a baby and no sand for babies period. I love Duck brand shelf liner, so easy to clean.
Even my adults get half marine carpet, half shelfliner, and they are smart, they've learned to poop on the liner. The adults get a tray of playsand to dig in on the side, And sometimes especially during the summer, it's changed to a tray of water for a soak if they want. Night time, if extra heat is needed, a CHE on a thermostat or rheostat is superior. Babies see all the colors of any light you try and it can disturb their sleep. Beardeddragon is correct also about UTH and how diurnal reptiles like dragons have fewer nerve networks on their dorsum to warn them when they could burn their little bellies. When I was a newbie, I had a UTH, but I learned from the real pros that they are useless at best.

I noticed someone recommended compact UVB. At the moment, until the manufacturers fix the problem, compacts are bad. They have been causing eye problems in many reptile species. Better to go fluorescent tube, like the Reptisun 10.0 tube for samll tanks, no smaller than a 20 gallon, and a nice Mega-ray MVB when you get a 50 gallon when the dragon becomes an adult. Of course, with a mercury vapor, a UVB meter can save you tons by measuring UVB output. I have had a few Megarays that have lasted well over 9 months putting out adequate UVB.