I don't often recommend something, but C LOVES this. He's been in it for over an hour, just kicking up his feet, grabbing at his dangly toys (I added more of his favorites in there) and yelling at all the animals on the sides of the tunnel. Hilarious!
https://www.babyeinstein.com/en/products/product_explorer/?product=30994&state=category&subState=cds
Re: Product rave--Baby Einstein's Animal Exploration Tunnel
click the pic (blog)
My sister has had this for her twin girls since they were 2 months (5 months now) and they just love it. I am going to purchase this too.