Pretty much any time works, including the exact start time of your event. Keep in mind face painting and balloon twisting are one child at a time -type of activities, so all of your guests do not need to have arrived when we begin the services. We can just start with the birthday child and siblings (or anyone who is around), and as we get through them more kids will have arrived.
If you have a magician or some other type of a show booked, please do keep in mind that unless your guests are ok missing a part of the show, a face painter would be sitting idle during the show. Time sitting idle is still chargeable time. Therefore, if you are booking a show and a face painter, please try not to overlap them. Always let us know if you have booked a show with another company.