Yes little fingers can cause all manner of trouble. Pushing centre plugs and tweeters in, bending styluses and pushing small items into ports and putting drinks mats into cd/dvd drawers, and putting pet rodents onto turntables.Bless the little tykes.
On the blu tac point it works. I've had flexible shelving systems over 6 feet high secured entirely by gravity, mass and blutac. Who needs 'No More Nails'?
Blutac is cool. That or sellotape can pull cones back into place when those little fingers have been doing their mischievous work too.