Hi CkC...
I didn't see whether you mentioned what operating system (OS) you are on? The latest for the ipad is iOS 5.01. Verify that on your ipad under Settings/General/About/Version
I have read there is still a need for developers to update their apps to work efficiently with the current IOS that is on the iPad. So knowing which version you are running may be part of if.
If you have not done this already, give this a try: May want to try these in order and proceed to the next step if it does not work.
Try to quit the apps that are an issue. To do this by pressing the home button twice to see the bar of apps on the bottom of the screen. Find the apps that are not responding and long press onto the app until it shakes. When it starts to shake, touch the red negative sign in the corner of the app. This will not delete, but will close the app. Than open and retry to see if it works.
If not, than restart the ipad. Press the power switch until you get the slide lock to power off. Turn back on and retry.
If not, than reset the ipad. Press the power switch and the home button until the screen turns off. May take a few seconds to power off.
Let us know if this is still giving you a problem.