Leaning Sprouts

I've got almost two week old sprouts, they're approximately 5-8 inches tall. Some of my rhino plants have really weak stems and continuously fall over. I've staked them and that helps for awhile and then I come back to check them later and they've fallen over again. PLEASE HELP!

we need real info, like the light source, its distance from the plants, ventilation? fans? put up some info man.....

I just recently staked them up and they've recovered nicely, I think because they were just so young and the tops were pretty big for one and a half week old plants.

You need a little fan running to strengthen the stems, unless you've already got one...