New DIY led Dice kit.

It can show any figure by chance.. ..
light up a figure when you touch.
light off after 10 second
can make other monochrome，RGB color or full color..

There is a charging port, you can charge it once, can use it for 3-4 days.

lithium battery inside the LED Dice..

used widely for KTV.. nightclub. entertainment venues…. Kid  Toy
very cheap too(about usd 5.5 per pcs )

Video show 

https://www.youtube.com/watch?v=jvv9jCBKyOs

https://www.youtube.com/watch?v=o26SZ1tZ7n4