Antlers for us too! By far the toughest! (kong..of the ones I see listed)
just a note for people who voted kong or just have kongs for their babies. we had a kong toy that was one of Brooke's favorites and we had it in the car as her car toy to keep her busy when we went places. It was a hot day and IT MELTED! Thanks goodness it was on a towel and not on the car seat or it would have been a nightmare. Just a heads up. Since a lot of you live in hotter places than CT. lol