Linda,
I love the idea of a few of something easy to germinate, to let them know they are doing well so far ... or not! And it makes the point that every plant grows differently.
I have lots of
Daikon Minowase Radish (long white roots when mature).
and some mild little
RADISH "French Breakfast" (Raphanus sativus).
Want any?
Another possibility would be some Bok Choy (Pak Choi), since you can eat the tiny leaves raw in salad (for example, sow very thick and eat the thinnings). Then let just a few grow big and unusual-looking, since maybe only 1-3 adults would fill a bucket..
I like crunching the sweet medium-young stems like celery! You could let them harvest a few each week as they crowded each other.
Since you can eat them at any stage, you don't have to wait the entire 35-45 days. I have tons of Bok Choy seed, several varieties.
