You may like to try this Idea from my time in Malaysia, (non aircon Single living in quarters). In order to prevent clothes and shoes going mouldy, the cupboards were fitted with a light socket on the floor. One simply fitted a low wattage bulb, (10 - 20 Watt) and turned it on. The bulb warmed the cupboard slightly and kept the moisture out.
Perhaps you could build (have built) a box(with some small holes top and bottom for a bit of air flow) with globe fitted, big eneough for laptop camerra etc. When not being used, bung the toys in the box and turn on the light.
Cant hurt to try.