Traditionally speaking you need to download software to your computer if you want to upload a program to your Arduino. CodeBender allows you to code from your browser, share your work to the cloud, ...
The readability of your code can make the difference between your project being a joy to work on, or an absolute headache. This goes double when collaborating with others. Having easily parsed code ...
I’m not a fan of educational toys. They’re usually either too educational or too toy-like and, in the end, kids get little education and little fun. The Code Kit from LittleBits has changed my mind.