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Head on over to Amazon where they are offering up this highly rated Snap Circuits Jr. SC-100 Electronics Discovery Kit for a huge discount! Shipping is free with orders of $35 or Amazon Prime members will receive free 2-day shipping. Be sure to check out the awesome reviews by over 3,000 reviewers.This set allows you to build working models of a photo sensor, a flashing light, and an adjustable-volume siren. There are more than 100 exciting projects in all with included 30+ snap together parts!