If You Have A Toddler Of Your Own..

[Mom_of_two]

Yes- all of their toys are just theirs! I don't make my girls share any toys. They choose to do so a lot, though. If they don't want to share it must be in their room. My playroom has toys for everyone. When I started I bought toys and things just for the daycare, so they have always been community toys. If I buy a new 'sharing toy' for the playroom, they understand, never been a problem.
If they ask to play with one of their toys, I ask if they are going to share it etc.

ETA- it would be a trial I imagine, if you try to give him a room just for him but I think it might actually help. He will feel that security and possibly not feel the need to take ownership of the other toys. Just like anything else, though, you are in charge so if you want it to be a certain way make it a certain way. Give him consequences and follow through with toy rules etc.

[erinalexmom]

I never allowed the DCK's to play with my kids personal things.

My kids were not in daycare, they were at home.

My kids had the choice to come into the daycare to play or go hang out in their rooms (they are teens now so only come in for special projects or to read for the littles).

IMHO, Personal toys/supplies and daycare toys/supplies are from two seperate worlds.

Yes. that.

[Crazy8]

I never allowed the DCK's to play with my kids personal things.

My kids were not in daycare, they were at home.

My kids had the choice to come into the daycare to play or go hang out in their rooms (they are teens now so only come in for special projects or to read for the littles).

IMHO, Personal toys/supplies and daycare toys/supplies are from two seperate worlds.

Same exact thing here. My kids have always had their own toys in their rooms and in our family room, which is not used for daycare. We've also always had the rule that if they bring something of their own into the playroom (the daycare room) that it needs to be shared.