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seed studio

for those who are less enamored with the electronics side of the arduino, you might be interested in the "plug and play" electronic block kit

here is the sensor shield - the sensors include resistors, etc and are plugged into the ports.

SensorShield.jpg

in general I encourage you to persevere, but I think this might work well for prototyping your ideas and having the opportunity to explore the interaction more deeply before diving into the electronic construction.