A baby bouncer can be a very useful aid in your everyday life with a young baby. Other than a pushchair and bed or cot, a baby bouncer is one of the most common baby accessories, and there are a wide range of different models. The simplest kind of baby bouncer consists of a metal frame covered by fabric, and these are often good at allowing the child to bounce but don't have the option of changing the seat angle. This design is often seen in older models but there are also modern variants with the same structure. A more advanced type of baby bouncer can be adjusted between sitting, resting and sometimes even completely reclining positions. Some baby bouncers can also be locked in a fixed position, so the baby bouncer can be used as a simple high chair. There are also baby bouncers which are more like an automatic baby swing that swings itself, and which can also have built-in functions for playing music or vibrating. These can be battery-powered or electric, and are often popular with parents of children with colic.