We have the monkey version of this and my little boy won't go to bed without it. It's basically a cute soft toy unicorn with an led torch built in to it. You press the button on it's tummy twice and the led light comes on for 10 minutes. As it's led it never gets hot and it will go for over 100 hours on one set of batteries. It comes complete with batteries and a pull tag to activate the battery so you don't even need to buy them to get you started
They also have a green dragon one as well - picture and link in first comment and video so you can what it's like.
£4.99 including delivery ideal for Christmas