Each group needs:

• laptop computer or Chromebook with Arduino Serial Monitor extension.
• Arduino Uno R3 microcontroller with accompanying USB cable (available online)
• HC-05 Bluetooth module (available online)
• nine-volt battery
• nine-volt battery snap (available online) with barrel connector
• solderless breadboard (available online)
• 4 male-to-female jumper wires (available online)
• FSR, square (available online) or round (available online)
• 10KW resistor (available online)
• Android smartphone or tablet with Bluetooth
• multimeter (available online)
• piece of conductive foam (optional)
• 2 pieces of scrap copper flashing or two pennies (optional)