Exhibit A: Tiny Earth made from play-doh
I only had yellow, red, blue, and white play-doh, so in order to make green and other colors they had to mix some of the play-doh up, which is great for learning about primary and secondary colors. I included these sheets on the tables for them to work with.
I can't find where I got the two sheets above, but if you've seen them please let me know the link.
The one-page solar system activity printable was a sheet I wanted to give out for kids to take home, but the copier wasn't working so that didn't work out.
Kids Press Magazine has another great illustration of the planets (Pluto included).
Some other fun things I found among my searches:
Post about Laika the Astronaut, a book I didn't know existed (Note: I've tried to read the graphic novel Laika by Nick Abadzis, but my heart will break.)
The book A is for Astronaut: Space Exploration from A to Z has Laika featured for the letter L, and in the P for Planets page, Pluto is included.
One patron made all the planets plus the sun!
If you are interested in making the play-doh planets scaled, check out these awesome instructions over at STEREO NASA.
Stem Sheets also has some cool planet flashcards.