Yes I think 40 mins would give you time to explain a few other things about balloon modelling, not more models but some tips and hints. So on the hour every hour would be good so that you get a 20 min break to get a coffee and relax a little. We did four straight sessions and never got a break till 12.30 for lunch and then two double sessions in the afternoon.
The balloons would still all have to be pre-inflated though, forgot to mention that the 1000 balloons took Lyn and I around 4hrs 30 mins to inflate the day before and we still had to blow up at least another 250 on the day.
The balloons would still all have to be pre-inflated though, forgot to mention that the 1000 balloons took Lyn and I around 4hrs 30 mins to inflate the day before and we still had to blow up at least another 250 on the day.