The chipmunks’ third digitally animated turn on the big screen parks the guys, their three Chipette counterparts and their human family on a deserted island. The return of Jason Lee as Dave, the rodent wrangler who keeps our pop-singing ground squirrels in line, gives the picture a hint of the heart that made the original work. The gags and jokes are tame. Parents shouldn’t expect much, but most kids will enjoy the show.