No entertainment needed. We did have an elefun which the children loved jumping up to try and catch the butterflies (ditch the nets at that age). The other children will just love playing with your child's toys.
DS will be 2 in a few weeks. We are having a party at home from 10.30-12.30 for 8 children. I kind of assumed they would just play a bit then eat their lunch and cake but went to another friend's party last week which had provided entertainment (Pop-up tales). Now I'm worried - should I organise something for them to do? If so, what?!