I recently went on a camping trip with boy scouts and forgot my tent stakes, which meant my tent was blowing away when no one was in it. I asked my boys to find sticks to use as stakes. I learned that thin sticks broke easily but thick sticks were impossible to drive into the ground by hand or foot. A guy had a lightweight plastic mallet, which worked pretty good. Later, I thought it would be better to have an adjustable weight mallet that was lighter to carry but which you could load with rocks, sand and/or water to temporarily make it heavier. I have been tinkering in my garage and made one that weighed 1/3 less when empty and almost 2-1/2 times more when filled with rocks and water.

Anyone heard of such a thing? Would anyone like to test it out?