Hi, sorry to say that it sounds like your beardie isn't doing very well and he should certainly be wanting to eat more than 2 crickets.
Is this the basking bulb that you're using? If so, that isn't a compact bulb, just a basking bulb.
http://www.shopwiki.com/detail/?q=Sun+Glo+lamps&s=277571&o=151903814&d=Hagen+Sun+Glo+Tight+Beam+Basking+Spot+Lamp+100+Watt What size tank is he in? What type of thermometer are you using to check the temps? If any type of stick-on thermometer, those can be off by as much as 20 degrees. The only 2 ways to get an accurate reading are with either a temperature gun or a digital thermometer with a long wire & probe end.
You didn't mention anything about a
UVB light. They need that in order to prevent metabolic bone disease and other health problems. Here's the best fluorescent UVB you can get in the U.S.
http://www.petmountain.com/product/bulbs/504983/zoo-med-reptisun-10.0-high-output-uvb-bulb.html
Babies can get dehydrated very quickly and that can affect their overall health, so I suggest you give him a warm soak (test the temp by the inside of your wrist) for about 20 minutes in either a transparent container or the kitchen sink. Make sure to put a washcloth down in the bottom to keep him from sliding around. Doing this at least 3 to 4 times a wk is very beneficial.
I suggest you pick up some chicken or turkey babyfood as well as some babyfood squash, mixed vegetables or green beans. Use a smaller amt of the meat and mix that in with one of the veggies. Heat in the microwave to take the chill off then use a plastic medicine dropper and put drops on his nose for him to lick off. Once he gets a taste, he should really like it. It's important that you get some food into him.
Are you using calcium and vitamin supplements? With your aged beardie, you should be dusting his live food with calcium with D3 but phosphorus-free 5 days a wk, but only 1 feeding a day and with vitamins the other 2 days a wk, but only 1 feeding a day.
Do you have the 2 beardies housed together, hopefully not since they are both so different in size. Please keep us updated on your baby.