we made a rocket out of a paper towel roll.
I suppose you could use a toilet paper roll for a different size if you wanted.
here's where I got the directions: http://www.enchantedlearing.com/crafts/astronomy/rocket/
it seems to be more for older kids; ones who can use scissors well.
but Sam was a big helper with the taping and the coloring parts.
my only suggestion if you try this at home, is to add the base last. do all your decorating first, then add the triangles for the base. otherwise, since it is just construction paper, it will bend easily when you turn it on it's side for coloring.
in this next picture, you can see Sam making rocket sound effects.
I love how boys do that!