Here is a dumbbell designed specially for glute and leg workouts. The TonerBum Dumbbell has an ergonomic design and lets you focus on toning your butt. It has 5lbs of weight. The TonerBum lets you perform donkey kicks, fire hydrants, deadlifts, swings, and other moves.
These dumbbells have a cute heart-shaped design for easy storage. They can also be used as a kettlebell.