Do not have loose balloons all over the floor if you are booking an entertainer. They are a BIG distraction and lead to some kids not wanting to watch the whole show.
Try to make sure your venue is big enough for the amount of guests you have invited, whilst also leaving enough room for the entertainer with their magic and table and for the kids to sit down in front of them on the floor.
Have the food ready to go for the food break so that it doesn't take too long and then we can have more time for the second part of the party.
Don't put any chairs in line with or behind the entertainer- so that people can't see into the magic box.
There is no need for inflatables aswell as an entertainer. Kids will be very entertained with what we are doing so do not need anything else.