Where is my duck?

#Day2 214012052021 I decided to grow 16 of them on the tray and another 4 in 3L fabric pot until I can identify the duckfoot weed. All of them can make it, so lucky. Some of them small and weak but some of them got thrice size of thier comrades I still got no clue at all, thier leaves still look the same. I expecting them to show thier traditional leaves within a week #Day3 101513052021 They are very strong and vigorous seeds as far as I can tell. Some of them grow really fast, they developed the second set of leaves on day 3. As you see some of them grow leggy, but that would be fine 'cuz I have so many plans for these guy. I found 2 seedling in one seed too, never dreamt that I would encounter this phenomenon in the first crop of mine.