By Lisa Schwarzbaum
Updated March 21, 2007 04:00 AM

A thingy from the future — part toy, part New Agey objet — falls to earth, and the siblings (Rhiannon Leigh Wryn and Chris O’Neil) who discover it hide the alien marvel, E.T.-style, from their parents (Timothy Hutton and Joely Richardson). The Last Mimzy, a pleasantly dorky adaptation of Lewis Padgett’s 1943 sci-fi story directed by New Line honcho Bob Shaye, bobbles its topicality (Homeland Security has no business here) and its clunky product placement (rah-rah Intel!). But the newcomer kids are delightfully…kidlike. Cosmic bonus: The Office‘s Rainn Wilson plays a New Agey science teacher. B