Boiling an egg is very easy with this Delfter Piepei. You just put the egg in the water with your eggs and it will tell you ( bij playing a song) when your egg is ready.
This egg plays only Ductch songs:
Soft boiled – In Holland staat een Huis
Medium boiled – Twee Emmertjes water Halen
Hard boiled – Wilhelmus (national anthem)
It’s not possible to replace the battery, but you can use the egg about 1.5 year.