You want to be extremely careful with non conventional anal inserts because even the most harmless looking object can cause some extremely painful damage. With that said, veggies are always a good bet (carrot or cucumber) and if you're in america, both CVS and Walgreens sell this mini toilet plunger about 1 1/2 ft long and the end of it has nice smooth ridges half way down the shaft. It's almost as if it were designed to be an anal toy.