We would love to enable flowtoys to charge wirelessly and have considered it over the years. However it would be expensive and challenging to fit the charging coil and required components in a location on our light engines that can get close enough to the charging base, in a durable way, without blocking light.
In order to offer the best and most durable props at the best price, we have decided not to include wireless charging. Perhaps one day when the available technology makes it more appropriate for flowtoys :)