I just stumbled across this interesting video which shows hot to make instant hot ice.

All that you need for this experiment is water, a pan, a small tray and Sodium Acetate. Dissolve the Sodium Acetate into boiling water until saturation. Then pour the liquid into a glass and cool it in the fridge. After the liquid become cool, pour it in to the tray.

Then, just touch the liquid and see the magic.