Jurong Frog Farm is Singapore’s only frog farm, now mainly run by Chelsea Wan, founder Wan Bock Thiaw’s daughter. While some Asian mums might balk at the idea of letting their 3-year-olds clean up frog pens, or venture too close to deep fish ponds, Chelsea is a cool mum. She thinks it's not too early for her son, Ninja, to start helping out on the farm.