Yeah we did this with Matilda right before Jovie was born to get her used to having a choice of snacks and access while I was breastfeeding. Now we have a snack box where I've put portions together in glad zip lock bags of things like rice cakes, crackers, dried fruit and cereal. Then I will offer her a choice from the snack box and then something from her fridge shelf like yogurt, vege slice, etc etc.