At the top, I would first write that the entire bearded dragon viv should be set up before the bearded dragon is purchased. Thorough research is recommended. Maybe they'd let you link beardeddragon.org.
Nutrition:
Good feeders are crickets, roaches, silk worms, phoenix worms, locusts, etc.
They should be smaller than the space between the beardie's eyes, but that rule of thumb can be stretched a little for worms.
All insects should be insured to be healthy and disease/pest-free. Do research on who you buy from.
Mealworms, waxworms, superworms, and butterworms should only be used as treats. Too much fat content.
Juveniles should be fed 2-3 times a day, allow them to eat as much as they can in 10-15 minutes.
Adults should be fed once a day. 10-15 minutes still applies for live feeders.
Veggies should be offered daily.
Crickets/other live feeders should be dusted with both Calcium Powder and Multivitamins.
Calcium Powder and Multivitamin powders should be SEPARATE.
This website
http://www.beautifuldragons.503xtreme.com/Nutrition.html has a good chart on how often to dust.
Habitat:
Vivs that open from the side are recommended for it is less threatening to the lizard. (the store may be against putting this in if they sell mostly top-opened vivs.)
Basking spot should be 100-105 for adults, 105-110 for hatchlings. 120 isn't good for any beardie, as far as I'm concerned.
For lighting, I would elaborate on UVBs, because people don't understand how important they are, and often don't get the correct UVB. I would also explain the difference between the UVB and the basking lamp.
I would only recommend sand or any other loose substrate for fully matured bearded dragons. Otherwise, reptile carpet, papertowel, and newspaper work fine. Those are also suited for adult beardies.
Supply list:
No spray bottle. Misting is generally frowned upon, it raises humidity. If one lives in a humid area, leaving a waterdish is also probably not a good idea.
Bathing dragon once or twice a week will suffice. I would include
bathing information in the
care sheet. Lukewarm water up to their armpits. Supervision required, they can drown easily. Use wrist to test water temperature.
Calcium dust and Multivitamins needed. A folded paper towel soaked in water is sufficient for the crickets to drink, but I don't know if they'd want you to include that because they want people to buy their funky water gel.
This site
ttp://www.beautifuldragons.503xtreme.com/Nutrition.html (same link as before) has a chart on foods to feed a beardie. The ones in green are good staples, you could include those in the
care sheet so people know what to feed. I would include to NEVER feed a beardie iceburg lettuce, spinach, or any citrus fruits such as lemons, oranges, and limes.
Hope this helps.