Avocados are another interesting seed to try, and all you need are a couple of hairpins or cocktail sticks to hold it in place.
Soak the seed for 48 hours in warm water and in a warm place.
With pointed end facing up stick a couple of pins into the sides to secure it and sit it in a glass of water with the flattish part submerged.
Keep topped up with water. It can take up to 4 weeks to sprout.