I introduced astronomy this week to our little guys. It's a fun album and one that we go back to quite a bit with the oldest. We started with a discussion of the universe and I showed a picture. It's a good time to emphasize that "the universe contains everything starting with you" and how BIG the universe is. Pass around the picture (or look together).
A fun (and classic) activity is to make a "universe jar." You need: jar, water, small pitcher, glitter, oil, dropper, and liquid watercolor (or food coloring).
-put all the materials on a tray
-explain that you are making a model of the universe
-pour a little bit of water into the jar
-take a dropper of oil and add a few drops to the jar
-add a few spoonfuls of glitter
-add a drop of coloring if desired
-screw the lid on and admire
-invite the kids to make one for themselves!