Summary

SunFounder's sensor's kit is a nice collection of variety sensor with 3 ~ 5 pin break out,
ready to connect with Raspberry-PI along with example programs. Although there is no sample programs came wit it, it isn't hard to connect them with 3.3V Arduino.

http://www.amazon.com/gp/product/B00HU0G9TO

This mount holds the following modules out of this kit, to a Lego compatible bricks for 2 x 3 foot print.

Active BuzzerAnalog Hall SensorHall SensorHydragyram switch sensorInfra-red ReceiverPassive Buzzer18B20 Temperature SensorRGB Tri-color LED (through hole)RGB Tri-color LED (surface mount) Red & Green common-cathode LED

The Lego measurement was inherit from SmokyFrosty's work here.

http://www.thingiverse.com/thing:39343