My $5 fund

I read something on Pinterest back at the beginning of February about saving every $5 bill into a "fund" and then when it's built up enough, spending it on something fun.  I latched onto this idea and started tucking away every $5 bill I got when the cashier handed me change etc... and look at what I have amassed in just under two months!

Now, granted, that's a $50 bill in there, but that's a stack of $185!  And I didn't miss those $5 bills one bit.  My question now... what should I spend it on?!  I think I'm going to put the money back in the drawer and see what happens in another 2 months.  I bet I'll be close to $500 by then!

Think you want to start a $5 fund too?