Building Circuits Lab: This is probably the simplest lab ever! Students are given wires, lights and batteries and are instructed to construct a series and a parallel circuit. My honest opinion is that an elementary student could do it. But every year I am once again surprised when my students can't set up these simple circuits. So I continue to do this lab again and again to reinforce the difference between the two types of circuits.
Building an Electromagnet Lab (TpT): In this lab, students will build an electromagnet. They will make adjustments to both the size of the solenoid and the amount of current to examine how that changes the strength of the electromagnet. This lab is relatively affordable if you're purchasing supplies on your own (depending on your class size). You'll need 2 D batteries per group, insulated wire (maybe like a meter-ish per group), and a large nail. Everything is reusable (well, the batteries die eventually, but you'll get plenty of use of out them before then). Oh and paper clips, but what teacher doesn't have those on hand?
Building an Electromagnet Lab (TpT): In this lab, students will build an electromagnet. They will make adjustments to both the size of the solenoid and the amount of current to examine how that changes the strength of the electromagnet. This lab is relatively affordable if you're purchasing supplies on your own (depending on your class size). You'll need 2 D batteries per group, insulated wire (maybe like a meter-ish per group), and a large nail. Everything is reusable (well, the batteries die eventually, but you'll get plenty of use of out them before then). Oh and paper clips, but what teacher doesn't have those on hand?