Can my children get celiac disease if a adult has it is it hereditrty?

Increased risk. There are heritable predispositions but it is still more likely the child will NOT develop the disease (4 to 1).
Increased Risk. Incidence of celiac sprue in this country is around 1/130. The niddk has a website for more info, first degree relatives of celiac patients are at much higher risk for developing it.