Is It Stealing?

The other day I went to the store with my children.  My 1yr old daughter was asleep so I opted to put her into the stroller rather than carry her in the store buggy.  As we walked around the store we picked up a few items and placed them in on our stroller.  The biggest thing I got was a package of 6 rolls of paper towels.  I ended up putting those at the bottom of the buggy since that was the only place they would fit.  Besides if I had put them on top, well I ran the risk of them tumbling over on my daughter.  She woke up while we were still in the store and looked around at a few things.  I grabbed a bottle of degreaser which kept falling over cause it didn’t have anything to hang on to.  So I’m in this store with 3 kids, two of which will not listen each time I say lets go.  Finally we make it to the check out, while I direct my boys each step of the way.  On our way to the car my 4yr old wants the peanuts we just bought, so I pull over and open them up for him.  That’s when I notice the package of $5 paper towels under the cart, that I forgot to pay for!  Do I go back or just leave?