HI we feed our beardies wax worms every two weeks about 5 each as a treat.
some times we give them meal worms but only the small one as the large one do not agree with them.
we have been doing this since they where four month old
hope this help
matt Welcome to Essex Dragons
u can give them calcigrubs, they love them and they are good for them, lots of calcium and no hard shell. here is a link to them, this site does 3 boxes of food for £7 incl delivery, they are dead good. Livefood Warehouse Calcium Worm
u can use meal worms too, but not too many at a time, and always try to feed the white ones, these are the ones that have recently shed thier skin and are much softer and easily digested. usually if u have a regular tub of mealworms, u will have about 20+ a day shedding, so i use only these ones for my baby beardie.