Can I tell you a tale, that may help you avoid making your 10 year old feel totally rejected by you?
You see, your story rang a bell. You were asked by a friend to pass on something your older DD owns... on thinking about it, you didn't ask your older DD first, you asked your younger DD if she would want them... so you thought you would give them to the friend after all.
In your mind, you had already removed them from your oldest DDs possession. You hadn't asked her, you just assumed... and thought it perfectly OK to offer her possessions to anyone who asked or crossed your mind!
The pram? Well, now you have started something... your DDs will now know that you will give away their stuff, without asking! You are, understandably, thnking of your won issues, but are also causing some for your DDs.
I lost so many of my childhood possessions. I could come home on any given day and find soemthing had just vanished. If I asked I was always told not to be silly, I didn't play with it any more, I had not touched it in months or I was being selfish as X wanted it, I should be happy to share:
My guitar that I apparently no longer used, days before I was entered into a competition!
My stamp collection, made by me and my deceased grand dad, as I never put my stamps in it, there weere always packets lying round - that I bought weekly with my pocket money - that were all given to a cousin, as he 'quite liked them'!
My kite. Stunt kite I had saved up for... Peter Powell original
Hadn't been used since before Christmas and, just as the weather was warming up, it was given to someone, no idea who. Well, I hadn't used it for months, it was just sat in a cupboard, alongside buckets and spades I woudl assume!
I got so used to this that I took to hiding stuff. I hid my charm bracelet under a floorboard under my bed. I was 13, it had 13 charms on it, all bought by grandparents, reflecting whatever craze I was into at the time. DM found it, gave to to a friend. I had no respect for it, apparently, as I had just thrown it under the bed, probably didn't even know it was there... under a floorboard, wrapped in pink tissue, inside a little leather bag!
You can imagine the relationship I have with my DPs now?
We are going to have to work out a compromise as a family where they get to keep their things and it doesn't get me overwhelmed clutter wise. Yes. A proper compromise, where they get to say "No mum, you will have to learn to deal with some of it" A compromise that changes as they get older, leaves them with some control.
Good luck. 