In this model, the students are the electrons, and the energy provided by the battery is represented by candies. The current is the amount of charge (electrons) moving in the circuit per unit time, measured in amperes.
A resistance slows the electric current; resistance is represented in this model by having the students climb over a chair. In order to increase the electrical current, we must speed up the movement of electrons; we do this in the model by adding extra energy in the form of extra candies (in a real circuit, you would add more batteries, or use a higher-voltage battery).
Students will feel warmer as they speed up, which mimics what takes place along a wire in a real circuit: as electrons pass through a resistance they release energy as heat