Robert de niro stars in the hilarious family comedy, adapted from award winning book by robert kimmel smith'. '.strtoupper('w')ith christopher walken, uma thurman and jane seymour'. '.strtoupper('p')eter is an average kid'. '.strtoupper('h')e enjoys school, has many friends and lots of varied interests'. '.strtoupper('b')ut when his recently widowed grandfather ed moves in with peter’s family, the boy is forced to give up his most prized possession of all, his bedroom'. '.strtoupper('u')nwilling to let such an injustice stand, peter devises a series of increasingly elaborate pranks to drive out the interloper, but grandpa ed won’t go without a fight'. '.strtoupper('s')oon, the friendly combatants are engaged in an all out war with side splitting consequences'. '.strtoupper('