In article , Me
wrote:

For a science experiment I am doing with a child, I am looking for a seed
that once planted will sprout and grow quickly such that height measurements
can be taken. The time frame that I am looking at is 7-9 days. Does
anybody know of a suitable seed that we can use? You help is much
appreciated.

Radishes come to mind

--
Talking about art is like dancing about architecture - Frank Zappa