You will need:
A jar with a secure lid
Decorations for the inside of the snowglobe
Jar selection is important; choose one that’s got a large enough base and is tall enough for the diorama you want to create, and make sure that the glass is clear enough to see though.
Assemble your diorama on the inside of the jar lid, and when you’re happy with how it’s going to look, use superglue to stick all your pieces down to the lid. Let this dry according to the instructions for the glue you’re using.
Fill the jar almost to the top with water and add some glitter. If you’ve got some glycerin handy, add some, as it will make the glitter fall more slowly. Then carefully turn your lid upside down and immerse the diorama in the water. Make sure you fasten the lid securely, and turn the whole thing upside down.
We decided to use a thin piece of lego as the base that we glued onto the inside of the jar lid; this means that when we get bored of watching a polar bear in a snow storm, we can easily take him off the base and add some other pieces of lego to make a completely new scene for our snowglobe.