began using the Baby Einstein Jumper when our little one was 6.5 months old! It was quick and easy to assemble! The baby enjoyed lots of giggles and loves spinning around and hitting the bongo drums, while batting at the hanging teether.  We use the jumper when getting ready for work so that we can keep her contained, yet entertained! The only downfall is that it is a larger item to store, but that is not unique to this particular product.