This has to be one of the corniest movies I have ever seen. It includes a lot of 1960s singing, dancing, and swimming.
The story is ridiculous. Tommy Kirk plays a martian from Mars who comes to Earth to start the beginning stages of taking over the world. He eventually falls in love with Annette Funicello. This makes him realize that he just wants to stay with Annette and he stops the invasion.
At the same time, there is a total separate story going on about how some gangsters want to steal a safe full of money from Elsa Lanchester. Lanchester was the first person Tommy Kirk encountered and she was more than happy to give him a place to stay. To distract Lanchester from catching them in the act, the gangsters decide to throw a pajama party for the neighborhood teens. As they are trying to steal the money, Tommy Kirk finds them and sends them away to Mars. Unbelievably ridiculous.
It is funny to see how teens were back in the 60s and that makes this film worthwhile. Other than that, it is truly awful.