Do a $1 Dollar Bill to $5 Dollar Bill Magic Trick

This switch will amaze most people!

Steps

Get a $1 bill and a $5 bill (or a small bill and a big bill of your choice).
Fold the $5 bill (big bill) into eighths so it fits into your hand. Keep this a secret!
Show the $1 bill (small bill) to your audience and make it clear that you are holding a $1 bill. For extra assurance you aren't cheating, turn it over so they can see the big ONE on the back.
Make it clear that you are folding the $1 bill (small bill) into eighths. During this time, secretly switch the $1 bill (small bill) and the $5 bill (big bill) so that the $5 bill is in your hand. Unfold it and show the audience you now have a $5 bill!

You can also do this trick with other denominations, as long as they're different.
Create distractions for the audience!
Once you've done the switch, show the audience the big purple 5 on the back of the $5 bill for extra assurance.
Try to find the crispest dollar bills you can find.

Do NOT use very old bills for this trick. They won't look good in the performance!
This may require practice, so practice in front of a mirror and when it is time to perform don't be looking at the bills the whole time!