I agree, I just kept putting DS1 hat back on, over and over. We are in QLD also & before that the very hot Pilbara in WA....a hat is a must. Especially since mummy burns to a crisp in seconds. I also choose better times of the day for when the hat is off, or pick shady areas to play. I always ensure the clam shell is moved to the shade etc & we have shade sail over our sand pit. DS1 figured it out eventually that it had to be left on & then when we got to 'no hat no play' it always stayed on. Now he is great at keeping it on. DS2 is almost 1 and he is terrible now also, so we start again.