Go to museums on free days. Make, never buy, gifts for others. Amy Dacyczyn created an empire on such tactics, with The Tightwad Gazette. Finally, give your kids time not money. It's OK to scrimp on yourself, but kids need to keep up with their peers or it can be scarring.
Nobility comes hard to teenagers.
On the other hand, they don't need the latest sneaker. Planned obsolescence need not be part of their lives. I bet a camping trip, just the two or three of you, is better than St. Bart's, if done with love. Ask any parent. A Word About Carin's Pets Carin complains that her pet care bill is too expensive.