If you only use ‘connected’ mode there are no limitations, as the program still runs on the computer. So you can use all of Scratch’s blocks and interact with real life sensors e.g. move a sprite on screen or play a sound when an input switch changes in the real world. - See more at: http://www.picaxe.com/Software/Third-Party/Scratch/#sthash.ucMQoQLD.dpuf