The USB power may be the smallest in the series, but it's big enough to send juice to all your creations. Connect a USB cable (included) to your computer or phone charger to start the power flowing. Try it with an LED to make the simplest littleBits circuit. If you're looking for a permanent installation, the USB power adapter enables you to plug your USB power directly into the wall.
*Disclaimer: Does not include power source.
If you're looking to track your collection or decide on your next bit, this list is a good place to start. Fill in the number of each bit you already own to get started. You can also see what bits are included in the most popular kits including Gadgets & Gizmos, Rule Your Room and the Synth Kit. Tip: try the grouping feature to change the view to group items by their inclusion in a kit. Fun fact: it costs $1,289.63 (US Dollars) to buy one of every bit on this list.