He has been using it for about a month (started at about 4.5 months old) but he his not yet jumping on it, just playing with the toys. Babies have to be able to hold their head alone, so generally they can't use toys like that until 4 months old: Finn will have to wait a few more weeks :-)
I came so close to buying this exact same one...it looks like so much fun. The store I was at only had 1 left, and I could tell it had been a return...box opened and taped shut, so I was worried about something being wrong with it. Now I wish I had gotten it instead. He looks like he is having an absolute ball!!
