Does anyone know if there is some sort of safety contraption that you can attach to the bottom of a bunk bed ladder that allow older children to climb the ladder but stop 2 year old monkeys? My youngest has never shown any interest in it before but in the 1-2 mins I was in the next room last night, he managed to climb to the top and then fall off so I had a lovely evening in A&E, he's ok thankfully!