I have 6 month old twins and one Jumperoo and one excersaucer.  They both prefer the Jumperoo.  While one's in the exersaucer playing and kind of layed back, the other one is in Jumperoo going crazy.  They bounce around with excitement and laugh out loud.  They absolutely love it.  That's the one toy they have that they don't get tired of, you have to take them out of it to give them a rest.