I allowed toys brought in a backpack, but only 1 toy is allowed out at a time. Once you put that toy back, then you are allowed to take another one out. That being said, any toys that are brought to daycare MUST be shared. The moment that it is fought over, it goes away. On PA days when I have my school aged children, they are allowed to bring their 'electronics', only to be played at nap time, or if we are doing a 'younger child activity or craft'.
If the toy goes missing during the day, the child goes home without it. I often come across it during my end of the day tidy, and send it home the next day. I am not responsible for any broken toys as things happen and I warn parents about it before they bring it.