This is an incredibly sweet idea. "Open when you need to know how much I love you; open when you don't feel beautiful; open when you need a laugh; open when you miss me; open when you're mad at me; open when you need a date night, etc.
Grad gift or a stocking stuffer.Get an inexpensive umbrella from the dollar store and dangled bills from the inside so that when opened up – tada! A little something for a rainy day… And tons of other cute ways to give money as a gift.
Money Tree / If you are bored of giving money gifts in plain boring envelopes, try the gift of money tree. It is a simple idea, where a real or artificial potted plant is used to staple or 100 dollar bills as leaves on it.
Milestone birthday postcards idea for Mom - send out pre-addressed postcards to friends and family for them to send back with memories and wishes for the birthday boy/girl. Such a great idea and inexpensive.