First I wandered around and picked up tiny things. I have an obsession with tiny things so it took all of about 4 minutes to gather the things up for this jar. In there I have tiny things like carrots, milk jugs, and wooden books from their doll house stuff (anyone who wants to see my craftiest crafts... check out the doll house pictures), tiny shells and stones from the nature table stuff, small rocks and heart shaped glass pebbles, a tiny clothes pin, a couple of glass marbles that had peace signs and quotes on them (for the older kiddos), and a sweet little glow in the dark frog. Then I filled the jar 3/4 of the way with short grain rice. At first I over filled it, thinking that it would be better, but it really doesn't uncover the stuff quite as well when there isn't a bunch of headroom, so if you try this, bare that in mind.
Logan had a blast with it. He spent about a half an hour just turning it and looking for the frog. He would find the rock and I swear he called it three different things. One was "a bug!". lol! It certainly was a perfect Eco-friendly craft.