You can put Holes
A Hole
put a hole in a box to make it lighter:)
Put the egg inside a strong container like a wooden or metal box.
The characteristic that makes wooden crates float in water is the wood itself. Wood has tons of little air pockets that when put in water don't fill up, causing wood to float.
no as it normally sinks down when put in water
Termites.
a torch
A Hole
Less.
put a hole in a box to make it lighter:)
Holes or helium can reduce the weight of a container, if you are going down the helium route, you better make sure it is sealed.
The answer is a hole. This is because you are getting rid of some of the box so it will be lighter.
a lightbulb
the hopper
look on riddles to ponder
Well you could remove the air from the metal box and put a very light gas in it such as hydrogen or helium that would make it marginally lighter, but I suspect given that these puzzles are mostly riddles that the answer we need here is lighter fuel, thus turning the metal box into a lighter?
A flashlight