Yummy colors and you have some great goodies to work with to make something gorgeous. (If you want to hop a plane to Santiago Chile and bring them along we could have a great time with these and have one artistic piece when we got done!)
Failing that option--- Design walls sure help with this kind of thing or using painter's tape with the blocks on an empty wall could help. Otherwise throw it all on the floor and stand on a chair and see what seems to look good to you. I am always surprised at the ideas that come up with these methods.
Good luck and post the photos when you get done.