I believe you can get the sandwiches on DDP (they are available at Beastly Bazaar, one sandwich, drink and dessert for 1 credits. Don't know about a kids menu, there may not be one).
The previous version of the "picnic", where you pre-order and pick up later, there was an option for chicken (and in the really old days, an option to get ham), plus hot and cold sides, has not been offered at all after December 2009. There are no sides available anymore, although I do believe the grab and go offers chips. I really don't know if chips are included with your meal on DDP.