I need to make 2 doors, one for my passage and one for my "safe" room for my family.

I was going to make them bullet proof and fill them with a material to absorb the impact,but instead I have decided make them strong enough that a bullet will actually bounce off. The door will have 4 dead bolts, 2 on either side. My question to all the bright sparks, what would be the best material to use, the door must be designed in such a way that,

when you look at the door it must just look like a normal wooden door

the wood must be thin enough that it doesn't absorb any impact,

the material used must ricochet the bullet with max force,

the weight is not a big issue but the lighter the better,

the cost, my family safety is worth more than any piece of material.