This Joke is meant for Boy Scouts.
Decide for yourself if it is appropriate for your younger scouts or not.

An art thief once stole some very expensive paintings from the Louvre in Paris. He took two Van Goghs, a couple Monets, a DeGasse, and some other paintings. 
Everything went perfectly, except he was captured sitting in his van with the paintings only 2 blocks from the museum. His van had run out of fuel! 
When asked by the police how he could plan such a successful robbery and then be foiled by such a simple error, he replied... 
'I had no MONET to buy DEGASSE to make the VAN GOGH!'