suspenseful enough for older kids but 
(ROOT (FRAG (ADJP (JJ suspenseful) (RB enough) (PP (IN for) (NP (JJR older) (NNS kids)))) (CC but)))
(ROOT (FRAG (ADJP (JJ ) (RB ) (PP (IN ) (NP (JJR ) (NNS )))) (CC )))