Surely to one of the coolest floors I've ever seen, Sensacell's LED-infused floor possesses over 1,000 interactive modules, each of which include capacitive sensors and a LED lighting system.
The integrated tech enables it to recognize when someone is walking over it and consequently light up as if to leave an eye-catching LED trail of their path.
I think this would be the perfect christmas gift for a child - Install an LED floor in you child's bedroom for christmas. How nice. Take a look: