The Ananas comosus (pineapple) is a bromeliaceae from the Central and South America known for his delicious infructescense. The name Ananas, come from náná náná which means "the perfume of perfume" in a native language of Brazil. The duplication this plant is really easy.
Step 1: What do you need
-Pineapple, not too ripe, with a healthy rosette
-A good knife, a bread knife works fine
-A pot, you can be creative and use your imagination
-Soil, go for an easy-to-drain soil (ex.: for bonzaï or cactii mix)