This kit makes learning to solder fun with its Star-Spangled Flashing design. The eye-catching Patriotic Flashing Star strobes 15 brilliant Red, White and Blue LEDs which outline the special cut 4-40" star shaped PC board.Practice your soldering technique first with the special "Dogbone" practice resistors. After you connect a few, you will be comfortable and ready to solder the other components to the PC board with confidence.The speed of the flashing LEDs can be adjusted with the trimmer resistor located above the IC chip. Celebrate the 4th of July, Memorial Day, Labor Day, or Your Birthday with this colorful display. Operates from one 9V battery (sold separately). Size of PC board is 4-1/4". Complete with all parts, PC board and instructions. Skill Level 1.