aimed mainly at little kids but with plenty of entertainment value to keep grown-ups from squirming in their seats . 
(ROOT (S (VP (VBN aimed) (PP (PP (ADVP (RB mainly)) (IN at) (NP (JJ little) (NNS kids))) (CC but) (PP (IN with) (NP (NP (NN plenty)) (PP (IN of) (NP (NP (NN entertainment) (NN value)) (SBAR (S (VP (TO to) (VP (VB keep) (NP (VBN grown) (HYPH -) (NNS ups)) (PP (IN from) (S (VP (VBG squirming) (PP (IN in) (NP (PRP$ their) (NNS seats)))))))))))))))) (. .)))
(ROOT (S (VP (VBN ) (PP (PP (ADVP (RB )) (IN ) (NP (JJ ) (NNS ))) (CC ) (PP (IN ) (NP (NP (NN )) (PP (IN ) (NP (NP (NN ) (NN )) (SBAR (S (VP (TO ) (VP (VB ) (NP (VBN ) (HYPH ) (NNS )) (PP (IN ) (S (VP (VBG ) (PP (IN ) (NP (PRP$ ) (NNS )))))))))))))))) (. )))