Can you do oats? We love oatcakes. I know some GF folks can't do oats either as they can be similarly irritating to the tummy, but I think Nairn's does a GF oatcake as well. We also do lots of yogurt. And then you can do things like melted cheese on oatcakes. You'll also probably find lots of the baby puffs (like Organix or Ella's kitchen, etc.) are made from corn or rice flour, so those might work as well. Rice pudding might also be an option if you make your own or can find something sugar free, like yogurt but something different and more filling.