The play tunnels are another one of those toys that I pull out sometimes when we're stuck indoors that I think if we just had THAT and nothing else, the kids would be happy as clams.
And they aren't just for crawling through. In an exciting discovery made last week, apparently they make great silos to fill with toys and stuffed animals. The fun of lifting the tunnel up and watching the tower of toys and animals collapse NEVER gets old. Luckily I have AMAZING kids here who LOVE to clean up! :-)