Marble Powered Cars

I've just finished designing this cool craft to do with your kids these holidays.  Each car has a marble inside, when you push the car, it rolls along powered by the marble inside.  They are really cute and pretty easy to make. Free printable template and instructions are on the web site here. 
I love crafts where you get both the fun of making, followed by the fun of playing with what you have made.  You can race them down a gentle slope too!
Enjoy :)