Colour the planets and find out a simple fact about each planet
Solar System book by Amanda Post (from http://printables.atozteacherstuff.com/download/space/solar-system-book.pdf) - file attached to this activity
Photo of planets (from http://eightplanets.org/800border.png) - file attached to this activity
Print out the books and staple ready for the meeting.
Go through the planets giving the order from the sun and introduce the mnemonic for remembering: My very elegant mother just served us noodles (mercury venus earth mars jupiter saturn uranus neptune).
Beavers then colour in the pictures of the planets - this could be done to students choice or to be like photos of the planets.
At the end of the activity or at the next meeting each beaver could be quizzed to see if they can recall the names of the 8 planets.