I googled around for some directions and I liked the idea of presoaking the seeds mentioned here. I also found the idea to use this real grass for Easter baskets here! Sounds messy, but really cool. (I am not a fan of the one-time-use plastic grass that gets all over your house.)
We decided on small glasses instead of a big tray because...
1) They're clear so we can see the roots growing. (We are currently learning about plants and seeds.)
2) They will fit on a tray I have for the centerpiece with some room to put our dyed eggs and whatever else I think looks good.
They got planted yesterday and are supposed to be nice and plush in 1-2 weeks. Just in time for Easter! (I hope.)
Shout Out to Beth, owner of DiaperCuts - A fabric store specializing in cloth diaper fabrics and other notions. She's a long-time i-friend and was nice enough to send me some (a tons) of seeds for this projects out of the goodness of her heart.
ETA: 1 week was not enough time. The grass was sprouted, but wimpy so it didn't make Easter dinner.