Luminaries -- use tin coffee cans (or soup cans, if going to hang them) and using a hammer and nail, poke holes -- sometimes random, sometimes in a lacy pattern. Can put citronella candles in these and light them for a nighttime get-together
Moonscape- bag of split peas & a bag of beans, sprayed silver. Moon buggy - dumper truck covered in tin foil. Astronauts - printed out photos stuck on toilet rolls. Rocket - plastic cup with craft foam top & wings, duct tape windows.