Does it have any volume control buttons? If so you could try this -
You need to do is to follow this steps and turn off you device please hold the this button combination that will lead you to recovery menu. power + home + vol up or Power + vol up or power + vol down after this please select factory reset by pressing the plus(+) or minus(-) button then select by clicking the power button and wait to boot again after that your tablet is ready to use thank you
Copied from here -
Giani Digital 8" Playpal Tablet password reset? - How to reset my password on my tablet :: Ask Me Fast