When I was pregnant, one of my friends gave me her hand-me-down Johnny Jump Up.  She told me that when her babies were at the crawling stage and she needed to get some work done in the kitchen she would put them in the Johnny Jump Up in the kitchen doorway and let them bounce up and down while she worked.

She said that they would bounce for hours, happy as can be, and then eventually fall asleep.  Well, let me tell you that it certainly seems to be working for us!  I was amazed at how much the baby loves being in that little thing!  And it leaves me free to do a few things without worrying if the baby is crawling away and getting into mischief!  If you can get your hands on one, I highly recommend it!