Hi
How old are the children?
We dont have a 'show and tell' as such, we do have a morning meeting, this is usually at 9am ish, we open the doors at 8.30am and children are free to play where they wish.
Also our meetings are a discussion about what is happening that day, what plans the children may have, what activities they want to continue with etc
Our 'show and tell' (its not about showing toys, but sharing a special event, or discovery on the way to Kindy or dance they may have learnt at ballet etc) will usually happen at the end of the day.
Children are allowed in earlier if parents have discussed this with the educators- school events, appointments etc.