[ThanhPhero]

Small amounts of money in the celebratory envelopes you can buy at any oriental store. Give to young children and old folks.
In Việt Nam that is called Lì Xì (lee see). A five dollar bill or a two dollar bill. American dollar bills are considered particularly lucky especially if new and crisp.

[MeganC]

Last year I gave out crisp, brand new $2 bills.

I gave the kids $2 and the adults $8.