1. Cut pieces of clingfilm to measure about 12cm square.
2. Break up the chocolate and melt it in a bowl over a saucepan of boiling water.
3. Remove from the heat and add the Krispies or Snaps.
4. Mix well until coated then leave to cool for a couple of minutes.
5. Put a heaped teaspoonful on to each clingfilm square, shape it into a sphere, twist the ends together to secure and then leave in the fridge to harden.
6. Put the icing sugar into a bowl and add enough hot water to make a thick paste.
7. Remove the clingfilm from the chocolate Krispies and coat completely with the icing.
8. Stick a Smartie on to the 'eyeball', and add a large dot of writing icing as the pupil.