First, go to the brick shed and go down the stairs. Press each button once then turn it off to find out the number of volts each one contains. Get a combination of volts to 59. Now go behind the house and climb the ladder. Pull the switch down. Go to the ladder left of the Spaceship. Go up and pull the switch down. Go inside the library and flip to the second last page of the Selenic Age book. Copy down the notes on a piece of paper. Now go inside the spaceship. Play each of the notes in the right order. Look at the control panel. Match the sounds in the right order you play them. Now pull the switch. Click on the book, you are now in the Selenic Age.