Grow-A-Heads are not Chia Pets. They are grass-growing plastic figures, preseeded with rye grass. You soak the head, fill the vase with water, and use the included plastic container as a greenhouse. In about 5-7 days, the grass hair begins to grow from its initial germination. The head of "hair" is fed with water from a wick and lasts a long time. See a review here.