how to make a mason jar terrarium

here's another project i have been dying to try. if you have an abundance of glass jars and are looking for a fun & quirky way to display them, how about trying this tutorial for a terrarium from craft. i love that you can make them your own by adding neat little toys and figurines in them. i think kids would love this project! does anyone have these out in their homes already? we would love to see pics!