There’s a fun little game me and Little Miss C play.

Little Miss C, who is 1 1/2, takes my wallet any time I leave it at a height she can reach. (Insert cheap sitcom jokes about wallet-grabbing females here.)

She likes to rearrange every last thing in the wallet: bills, credit cards, business cards, train pass, Metro Cards.

Yes, Metro Cards.

I don’t know if I’m the only one with this problem, but I’ve got a half dozen of the things in my wallet, five of them with less than a buck on them. I’m sure there’s some algorithm out there that would prevent me from ever having loose change on my MetroCard, but right now it eludes me. Since fares went up to $2.25, I’ve been left with a less than even sum on my cards. When I buy a new MetroCard from a city machine, I can add on to that card and hope to someday get it to an amount that divides equally by $2.25. When I buy a new card at Hawthorne station, my only option is a $20 card, and the almost useless old cards pile up in my wallet.

Well, Little Miss C rearranges everything, with half the cards spilled on the floor. I hastily put my wallet back together, then forget about our little game until the next morning, when I’m rushing to the subway under Grand Central, half the damn city behind me as I approach the turnstile.

You see where this is going. I try card after card, the turnstile rejecting me with a rude Insufficient Funds time after time. The would-be riders behind me get more agitated, thinking me some out of town rube.

Back at home, Little Miss C is surely laughing.