Blue Part On The Eraser
These erasers are commonly used by kids in school. Some say that the blue half erases pen ink. The truth is that it is for special, thicker paper! The other half is for regular loose-leaf or notebook paper.
Square Patches On Backpacks
You can use the square patch on your backpack to carry more stuff. It is great when your bag is already full to brimming. All you need to do is insert a string or rope through it and hang whatever you want.