Try the experiment on germination as described above and allow the plants to keep growing until the children see flowers, seeds and possibly new plants again.
(the children; see; flowers, seeds and possibly new plants; T:again) (the plants; growing; T:until the children see flowers, seeds and possibly new plants again)
the children the plants
see growing
flowers, seeds and possibly new plants T:again
T:until the children see flowers, seeds and possibly new plants again