Start off by hot gluing the two parts of your mason jar lid (the ring and the insert) together. You want to make sure your insert has a gasket (rubber seal) on it so that it seals tightly.
Next, hot glue your tree or other miniatures to the plastic base you’ve created.
Then, prepare your water/glue mixture. Start by pouring Elmer’s Clear Glue into your jar. You could use more or less, depending on how quickly you’d like your glitter to settle.
Then add your glitter to the jar.
Then fill the jar the rest of the way with warm water. Flip your tree lid over, slide the tree into the jar, and seal. You can hot glue it closed, if you’d prefer. Then flip over and shake gently to combine the water, glue, and glitter and you have an adorable mason jar snow globe!