Movie Making: Children making Safer Journeys

I tried making a skate park, but I couldn't make it.  I made heaps of mistakes on it, so I just made people.  I made the alien for the 'Road Safety Crew,' with the car Hippy and Road Ninja.  I tried making a skate park boarder, but it was too small.  The characters had to be at least 25 cm to 30 cm tall.  There were heaps of skateboarders anyway.  My favourite bit was when we made the people.