Our Amarylis Bulb After 2 Weeks....

It has been two weeks since we planted our Amarylis bulb.  It was 3 cm to start.  The first week, it grew 2 cm, this week it grew 3 cm, and now it is 8cm.  The plant now has 4 leaves.  Last week, it only had 3 leaves, and when we planted it, it had 2 leaves.  One of the leaves has a cut in it from someone playing with it.  We water it once a week.  We put a rock in it to decorate it.  We think it is growing fast.  Someone measures it every day.