BH (Ben Higgs) has got one child. SOD (Sam O'Dell) hasn't got one child. He's got two children.
BH has got three fishes. SOD hasn't got thre fishes. He's got two fishes.
BH has got one sheep. SOD hasn't got one sheep. He's got two sheeps.
BH has got three mice. SOD hasn't got three mice. He's got two mice.