Coming from the south side of the airport via the Greenway there is a brand new Super Wal*Mart on John Young. Not sure, however, which direction from the Greenway.

However, if you are still interested in the Kissimmee one, take the Greenway to rte. 535, take a left, follow that to 192, take a left and it will be on the right approx. 2-3 miles down, still right beside Midievil Times.

I think the John Young Wal*Mart would be much better in terms of anxious kids.
As to Goodings, I think they are outrageous, much higher than good ole CT is. And, that is darn high.
I believe you can get some excellent directions to walmarts everywhere by accessing their web site,
www.walmart.com.
Let me know if I can help further.