Early Intervention/physical therapist says to limit babies usage to no more than 30 mins a day! Same goes for other Jumpers that hang from the door frame. Its not good for their legs.this is bulky and hard to move. The three posts shake and create lots of noise.Although they are a "safe" place to put child, while older kids are in room or have to run to the bathroom. I like the "exersaucer" style better.