C.O.
2 months ago my toddler (3 in February) helped me EAGERLY with this! The way I explained it was...
(In toddler speak) "We're giving the toys to babies that doesn't have enough toys, which ones will they like?"
Her response was ridiculous. It was hard to keep any toys in the bin! She was so happy and excited to give the toys to babies to make them happy. She knew which ones she really wasn't gonna let go and which ones she was ready to give away.
They are the sweetest little souls, we don't give them enough credit to do the things that they can do if we let them. Good luck, it will go great!
It's always good to get the reward of a couple new toys at the end of the process too if you are planning to go that route.
The hard part really was ME! I just couldn't let go of the baby chew toys that I thought were so special... I just made the deal with myself to set aside 5 small toys that were her ABSOLUTE FAVORITE, and that would trigger the MOST memories when reflected on and I'm gonna put them in a shadow box with photos of her with them. But I'm a softy so I'm not sure how hard that is to do for other mommies.