This is wonderful for our 18 month old grandson.  He likes to crawl into it and 'hide' to play peek-a-boo.  We also toss a ball into one end and try to make it pass out the other end.  Grandfather can even fit in halfway, which tickles him.  There are two see-thru areas (one at each end) and it folds up to put away when our grandson isn't here.  I recommend attaching the Velcro tab to a chair leg or something else so the tunnel will stay in one place.  It also has an attachment that might fit some play tents, but we don't use it that way.