Here is a quick how to if anyone is interested in doing it, or perhaps it's something to do with the kids over the weekend.
You need a big box of Rice Krispies, 200-250g of chocolate (I use normal plain cooking choc, but it's up to you) and a normal sized easter egg.
The first problem is opening the egg without destroying either it or the foil it's in. There are 2 ways of opening the egg. Last year I just smashed the top in, got the bits out so I could rebuild it later on. This year, I used a small sharp knife and pushed it in through the seam. A couple of CM and the egg practically falls apart although you may get a bit that doesn't break properly.
Lie the egg halves on some silver foil and start to melt the chocolate in a large bowl (I do this over a pan of boiling water). Keep stirring and once completely melted remove from the heat and add rice krispies. I think everyone knows how to make choc rice krispies so I'll leave it here
Next, leave the choc krispies to cool for 5-10 mins. This is to ensure that the egg doesn't melt when you add the krispies to it.
I am guessing you split it in half, so the next step is to start adding the krispies to the egg. Fill each half and make sure its compressed down but that not too much is sticking higher than the rim, a little is good as it helps with bonding later.
Once both halves are filled it's time to rebuild the egg. Couple of ways of doing this. You can either reply on the krispies compressing when you push it together to hold it. You can heat a knife up and spot weld the seam or you can add more melted choc with a cold knife around the seam like a cement. Place it in the fridge for 30 mins so it cools and hardens.
Re wrap and package
Most of it is obvious but thought I'd add what I do so you don't make similar mistakes to me