keep a special box for each child. put the really special things in there. such as a few samples of early toddler art work. and maybe a favourite baby outfit for each.
also you can take photos of them with their favourite toys and keep the photo, then give away the toy.
this week we managed to give more toys to charity shop than arrived in our house at christmas - decluttering success!
and for things you feel too sentimental about to throw, put in a box in the loft. and 6 months on, when you and the children haven't missed them, give them away then. it's less painful that way.