There are many ways to top your sprouting jar. I have a set of three plastic lids. Each with different size drainage holes to accommodate the specific seed being sprouted. I use the smallest for starting all my seed, but will switch out to the large when large seeds like mung and lentils begin to sprout. Of course the smallest is perfect for alfalfa, radish, and broccoli sprouts. If you don't have these handy lids, a simple piece of folded cheese cloth and a rubber band will suffice. A canning jar or two and you are ready to sprout.
I buy my seeds for sprouting from my local health food store but you might want to check out the Sprout People for a bucket load of sprouting information as well as some great recipes for your bounty.
In 2 minutes you can watch the super happy Anna Wilde and her husband Roger of Wild Health Food regale you with the joys of sprouting.
I in my woolies, bid you g'day.