Mini BMX bikes are suitable for stunts. They are best for indoor use in skater parks, but can also be used outdoors on ramps and to make grinds on rails.
As the mini BMX name sounds, it's basically a smaller version of a freestyle BMX bike. This makes this type really good for the young and small riders who want to try out the BMX sport.
However, it should be mentioned that adult riders will also be able to use a mini BMX for their wild tricks on the ramps in the skater parks.