The Electronic Decision Maker Mini Soldering Kit is a fun and easy DIY mini kit that helps you make decisions. Ask it a question, press a button, and the yes or no LEDs begin blinking alternately. Gradually the blinking slows down until only one LED remains lit, answering your question with a green LED (yes) or a red LED (no). The circuit is low power and powered by a 9V battery (not included in the kit). The kit includes a battery holder that can be connected to the circuit board.