To make a cup lighter, you can remove some of its contents, such as liquid or solid items. Alternatively, you could replace heavier items with lighter ones, like substituting water with air. Using a lighter material, like foam instead of solid objects, can also achieve this effect.
Helium.
You can put a hole in the wooden box to make it lighter. By removing some material from the box, you will reduce its weight.
You can put a hole in the wooden box to make it lighter by reducing the amount of material in it.
holes
A hole!
A hole can be put into a box to make it lighter. By removing material from the box, its overall weight will decrease.
You put water in a cup then you put any color you want to put in the cup then you get a spoon and mix it up and put what you want in the cup and lat it sit in there
You can put a small piece of flint and steel inside a box to create a spark for lighting a fire. Alternatively, you can place a lighter or matches inside a box to provide a convenient way to light objects.
you can put lemon juice in it, and it will get lighter in the sun. that's what i did and mines almost drity blond. (:
A Hole
Termites.
a torch