Hi Kim! I love that you use the Disney Dollars for your kids. My family started a game with them the first year they came out and we have been doing it for every single Disney trip. My adult children who now have their own kids insist we play so I take that as this is a big hit.
Disney dollars are indeed still available. The resorts will have some at the concierge desks or front desks but they often don't have many and possibility the denominations you need. Your best bet is to head to the parks and stop at Guest Relations inside the entrances. I have always found the Magic Kingdom the best place for me to get what I need as I usually need several hundred dollars and all three denominations.
Please remember that you can only charge up to a certain amount on your credit card. If you need more then have your spouse or a friend also charge on theirs so you can get this done in one stop. Check out these frequently asked
QUESTIONS about ordering Disney Dollars and also about
PURCHASING them. They are great to have kids use during their Disney vacations and many times they will become so attached they will not even want to spend them but instead take them home as their souvenir.
Have fun and let me know if you need our game idea for your upcoming vacation!