Electric Paint Pen is like a liquid wire. It acts as a conductive adhesive and can be used as a capacitive sensor. Suitable for application on a wide range of materials from fabric to wood to paper. Nontoxic, dries in under 15 minutes to become conductive, Size: 10ml tube
Interface Shield provides a convenient way to make connections from microcontrollers to sensors. Shield plugs directly on top of and adds two BTA (analog) and two BTD (digital) sockets, be used with SparkFun RedBoard, also works with Intel Galileo
Millisecond Counter Apparatus for measuring the time it takes for a ball to fall a certain distance using a digital timer. Very easy to set up and use but nevertheless highly accurate.