I was about 6 playing in our park which was situated on an Army Barracks in Northern Ireland, so the area was restricted from the local kids due to the situation then.
Was with my dad happily climbing up the wooden steps on all fours to get to the slide and I put my hand onto some small bits of broken glass. Cut deep into my hand and nicked a vein, lots of blood and my screaming.
My dad rushed me to the medical centre and they sorted it out, he went back down to clear up the blood and get rid of the glass, what he found was tiny bits of glass on every step placed into the cracks between the steps all over the park. Some horrible person had done this deliberately, and as this was the little park only small children used it!
The RMP came out and got it closed off until they could get it all cleaned away etc - not sure if they ever caught the person responsible, probably not as it was a very transient barracks during a very difficult time.
Sickens me now to think that someone would be that callous and mean towards children.