Yay for being honest! So many people just give their kids fruit and then offer up the leftovers to be weighed, knowing that the staff aren't going to touch it. Maybe do the whole buy/sell thing with her when you get there? Take her straight into the fruit/veg part and ask her to choose something and get her to take it to the register so she can buy it herself? I used to work in a fruitshop and we had kids do this. Tiny little hands reaching up over the counter handing over coins, so cute! Then she can eat while you shop!