Science Buddies: "Ask an Expert"

I would like to know how to make models as a small car model or rocket or any things else

What are you trying to use these models for? If you let me know I can help you with your question.

I'm not sure if ahmed.soliman needs help anymore, since this question was posted last year, but anyone on the forums interested in this topic could look at this site for building a neat little bubble-powered rocket: http://spaceplace.nasa.gov/pop-rocket/. It makes for a nice, just-for-fun project!