Snap Circuits - Introducing Students to Electronics
Snap Circuits by Elenco. There are a variety of kits available, and each kit allows for the creation of many projects. The kits are easy-to-use and most pieces are very rugged. The suggested age is 8 to 108 - easily most second graders could enjoy this, even struggling readers as the directions are pictorial in nature.
Teacher's Guide from Elenco's website for only $5.95 (currently). From the website: "The Teacher Guide is meant to prepare educators for proper introduction of Snap Circuits and guide them through each chapter with quizzes for the students to test their knowledge."