There are several different tools students can use to explore circuits:
Snap Circuits
Snap Circuits Student Guide
CI-73 Software (Install Required)
Snap Circuits YouTube Playlist
Circuit Scribe
Circuit Scribe Projects
Circuit Scribe YouTube Channel
Squishy Circuits
Squishy Circuits Projects
Squishy Circuits Recipes (Dough)
Gadgiteration - Squishy Circuits
K to Grade 4
Grades 5 to 9
Grades 10 to 12