If the bluetooth logo is not showing up on the iPad's screen, then bluetooth is not turned on. It should be there, gray if there is no connected device, white if there is.
If it is on in Settings > General > Bluetooth, try turning it off, then back on again. If that does not work try a restart and/or a reset of the device, than go back into Settings and turn it on again. If none of that works, you may have to restore the iPad. If that does not work and you are still within your one year hardware warrantee, contact Apple. You may need a new iPad.
Restart: Hold down the power button until the power off slider appears. Slide it off. When the iPad finishes shutting down, hold down the power button again until the Apple logo appears.
and then a reset if that does not work.
Reset: Hold down the power and home buttons until the Apple logo appears. The iPad will reboot. This usually takes a bit longer than a restart.