Brain Box The output for Electrical Circuits will be you making different electronic circuits using the “Brain Box!” Some circuits will have lights, fans, music, sirens, etc. This should be a lot of fun! You should be making all CLOSED circuits (there is no break in it, so there is no stop to the flow of electricity), but if you notice something not working, you may have an OPEN circuit (a break which will stop the flow of electricity). Pay close attention to what you make. Are your circuits mostly series (only one pathway), or parallel (more than one pathway)? Describe what you learned today. Tell about your favorite circuit you made. Was it open or closed? Was it series or parallel? What did your circuit do? Feel free to draw a picture of your circuit after you finish writing!