My, how we have evolved. First there were messages in bottles, now there are Magic Message Eggs. Theyre a much more modern form of delivery and outshine Royal Mail for reliability.
Its all very Jack and the Beanstalk. Pop the can open, add water. Within hours, the egg will crack and a erm bean plant (not a chick) begins to grow with a message like Happy Birthday or I love You. The bean will germinate in about 5 to 7 days, by which time the message will be fully 'hatched'.
How? Dunno. And probably best not to ask.
Magic Message Eggs are a healthy alternative to Easter eggs.just dont eat them folks