Slow close system for toy boxes required!! Urgent!

[toffeeapple]

Hi, I would really appreciate your help, I'm looking for some slow close hinges that I could fix onto my children's toyboxes, which at the moment have ordinary normal close hinges.
My kids got their fingers trapped several times (and some of their friends!!) and I don't feel like I can let them play freely in their bedroom unless they promise to call me if they need their toy box opening.
I've looked everywhere for them, no success at all, apart from slow close hinges for kitchen cupboards which my husband says are not suitable. Any suggestions?

put some sort of rubber stopper on the lip?
There have been, I am sorry to say, a few fatalities with them shutting on back of necks

Oh dear, I hadn't even thought about back of necks! Sounds painful!
Yeah thank you so much, that is an idea which I will do as a last resort, but I was really after a slow close system.

There is this on from a US site, but they do deliver to UK.

Actually looks like they are a UK company!