I remember a crawling tunnel from my childhood, but it was made of cheap, thin plastic and wire that tore easily. This is NOT that tunnel. Pacific Play Tents makes the See-Me 6 foot tunnel with flame retardant 70 denier nylon and sturdy, collapsible, padded steel spring construction. It has two nylon mesh windows for seeing in or out and has velcro tabs at the ends to connect to a play tent or another tunnel.
I purchased the tunnel primarily for my 10 month old and 3 1/2 year old sons but knew that my 7 year old would enjoy it also. When I received it, I hid the box under my bed until I was ready to wrap it for Christmas and then forgot about it. I found it the next week and it was like Christmas morning again for the hobbits. They loved it! M2 wasn't hesitant at all and had a blast hiding and crawling through it. Of course, I had to give the older two warnings about misusing it, like jumping on or over it or being too rowdy.
They have played hide-and-seek with the baby, pretended that it was a shower by standing it up, and that it was a rolling, hollow log too. They play with it daily and it is still in great condition, which is saying a lot because my boys don't play gently. I love that it is collapsible with velcro straps and it fits under our ottoman for out-of-sight storage. I would recommend the See-Me Tunnel for active, indoor play for any child who is crawling up to age 8.