I see pages around every once in a while that encourage people to save increasing dollar amounts each week and I was interested in the math aspect.
I messed around with different dollar amounts and thought I might share them with you. While these don't have an end result with large dollar amounts it shows that even small savings can add up. Add in interest from a savings account and you're doing even better.
(I did smaller amounts because some of the weekly challenges I've seen can get pretty pricey!)
This link takes you to a Google Sheets page. There's four tabs at the bottom: Kids Weekly, Adults Weekly, Adults Biweekly, Kids Biweekly.
Have you done any of the saving challenges floating around the internet? I think it would be a fun way to encourage kids to save for a vacation.