Jumping Ring
A light aluminum ring, when placed on the iron core sticking out of a large AC electromagnet, is ejected violently into the air when the electro-magnet is activated. The conceptual explanation is that the AC magnet is continually reversing polarity, and induces a voltage in the ring so the ring's magnetic field continually opposes (repels) that of the iron core.
Copper rings and split rings are available to test also. A heavier copper ring will float midway up the iron core. When the ring is forced down on the iron core, it becomes very hot. A split ring will not move; it is not a complete circuit.
Magnetically Damped Pendulum
A pendulum with various disk is arranged to swing through the poles of a powerful permanent magnet. A solid aluminum disk is stopped on the first pass. An aluminum disk slotted to reduce eddy currents is moderately damped, and a cardboard disk swings freely.
Various rectangular plates can be released to fall through the poles of the magnet. An aluminum plate slides viscously, a slotted plate more rapidly, and a cardboard plate is unaffected.
Russian Version
Two rings are balanced on an arm which swings freely on a bearing. When a magnet is thrust into one ring, it is repelled away. (You can use this to illustrate the answer to the question in connection with the Faraday demonstration [1], "Where does the energy come from that moves the galvanometer needle?"). When the magnet is pulled out, the ring is attracted towards it. The other ring is split; thrusting a magnet in and out has no effect on it.
Osheroff Demonstration
A copper plate is cooled with liquid nitrogen to improve its conductivity. A falling magnet bounces without hitting the plate and lands on it's edge.
Links:
[1] https://demoweb.physics.ucla.edu/node/197