These are so simple to make.
What you will need:
I was fortunate enough to have some laying around in my sons bathroom. They were the ideal size.
The air plants I purchased off of Amazon.
This glue I also purchased on Amazon.
Place a dime size amount of glue at the base of your air plant and slide into your shell.
Here they are. Maybe 5 minutes prep and an hour dry time. How cute are these.