DD is 13 months and has just started climbing onto the furniture, ie sofa.
She sits on her knees and bounces up and down looking rather pleased with herself, but DP has just called to say that she fell off the couch and cut her lip 
Our living/dining/kitchen area is all open plan (in a kind of L shape) and DP said he was in the kitchen area for a minute then heard the thud and cries. She was at her toy box one minute and the next she was on the floor by the couch crying...
Anyway, I am aware that accidents happen but, other than being by her side every minute of every day, is there anything we can do to prevent this happening again?
Or do we just accept that she's going to fall off sometimes, until she learns?
I have suggested to DP that every time he has to go to the loo, or make lunch, or hang up washing he puts dd in the playpen - she hates it and screams to get out, but if it keeps her away from harm then it's the lesser of two evils...
Just looking for reassurance really and perhaps an idea of what you do with your very active toddlers?