What's a good alternative to the Rock n Play???!!

My LO is 15w and he loves to kick his little legs. He's getting taller and seems really restricted and squished in the Rock n Play. He loves it, but I am wondering if there's an alternative that will give him more room but is still high enough off the ground and somewhat portable so I can easily move it around the house. I have the Mamaroo already and he hates it. Any ideas???