Currently Being ModeratedMay 18, 2013 10:18 PM (in response to kathrynkinney)
Check your restrictions
Currently Being ModeratedMay 18, 2013 10:19 PM (in response to kathrynkinney)
Assuming your iPad has never been hacked or jailbroken, the App Store is one of those iOS supplied icons that cannot be removed.
So try restoring your iPad using iTunes on your computer. Plug your iPad in to iTunes, let it sync, and choose "Restore" from the iPad's summary pane in iTunes.
If that doesn't work, use recovery mode as described here:
UPDATE - Restrictions might well explain it, as Diavonex explaine.