I think that I have seen television scenes in some sort of play setting where children wear velcro covered clothing and throw themselves at velcro covered walls and sometimes stick to them.

I found an article with the history of velcro walls.

http://www.airfungames.com/party-rental-resources/velcro-walls-history[1]

Apparently velcro is strong enough to stick even adults, heavier than children, to walls.

And an improved and stronger velcro prison suit could stick prisoners to improved and stronger velcro walls so hard that the prisoners would be unable to free themselves from the walls until and unless the guards pulled them off.


  [1]: http://www.airfungames.com/party-rental-resources/velcro-walls-history