A CargoTrike is a cargobike with 3 wheels. Often this is chosen by people who have more than 3 children to transport. The Trike is equipped with 4 seatbelts as standard. With the wide version, even six children can be transported on the side mounted benches with seatbelts. The advantage of a tricycle is that it also stays upright on stand still or slow cycling. The disadvantage of a Trike is that it requires some practice getting used to steer.
Also, the maximum speed with a trike is often a bit lower than with a two-wheeler.