Today I discovered an iPad app called Virtual Manipulatives which was created by ABYa.com and is currently free . This app explores fractions, percentages and decimals. To begin, you need to select fractions, decimals or percentages and then you drag across a piece. You can switch between fractions, decimals and percentages in order to explore equivalent amounts. There is also a drawing and eraser tool and the option to save.
If you do not have an iPad there is a virtual set of fraction bars online. Also, if you have a SMART board you may be interested in creating your own fraction resources. Below is a video tutorial.