To care for the crickets you will need to supply a water source for the crickets that they cannot drown in, I use the jelly-like Fluker's Cricket Quencher. You will also need to "gut-load" your crickets before feeding them to your Beardie. This means, giving them a big nutritious meal before they become food for your dragon. I use a mix of calcium carbonate powder, reptile vitamin powder (or avian vitamin mix), oatmeal, pelleted bearded dragon diet, and sometimes a little cat food. I mix this concoction up in a big jar and serve it to the crickets in a little lid inside their enclosure. Most people recommend feeding the crickets for at least 24 hours before you feed them to your dragon.
Now remember, that bearded dragons are omnivores and they need daily meals of fresh, dark leafy greens (mustard greens, kale, dandelion greens, endive, etc.) This is for both babies and adults. As your dragon matures you will want to decrease the amount of crickets. There are several quality commercial bearded dragon diets and many breeders are switching to these diets. With young beardies they soak the pellets (just until soft) and sprinkle them over their salad mix. Then they supplement their diet with gut loaded crickets about 4 times per week. With their adult beardies they often omit the crickets altogether, stick with the juvenile sized pellets and salad and occasionally give silk worms or other suitable invertebrate.
I would also caution against getting a beardie from a pet shop and I would also avoid getting a hatchling and instead get a dragon that has gone through its first shed. I am currently purchasing a beardie from Fire and Ice Dragons, they are very professional and committed to the health and safety of their dragons (www.fireandicedragons.com). Also all reputable breeders guarantee live delivery and send their dragons overnight.
Stacey Rader