Is your iPad frozen? The iPad occasionally stops responding for various reasons. If you experience this, try these tips to resolve your issue:
Try restarting your iPad. To do this, simply press and hold the Sleep/Wake button until a red slider appears; then slide the slider. To turn back on, press and hold the Sleep/Wake button until the Apple logo appears.
If tip above does not work, try resetting your iPad. To do this, press and hold the Sleep/Wake button and the Home button at the same time until you see the Apple logo.
If above tips do not work, the issue could be that the battery is fully depleted. Plug it into a wall outlet for a while and see if your battery holds a charge. Please note that it can take up to 20 minutes of charging before the iPad will start up.
If you are still having problems, try connecting the device to your computer and launch iTunes. Then select Restore.