Hi - we took an 18month old toddler last year with no major traumas.
The flight was long but luckily she sat through the whole of it.
Food was fine chips, egg, beans etc.
The heat was fine (December) but spent most of the day under a brolley.
No problems with illness or mossies but very careful about how many gallons of repellent she was covered with at night.
Milk is available in cartons although nappies are not up to much, better to take from UK.
We did talk to another couple with a very small baby who had a fab time.
Any queries feel free to ask.