A clutch of 10 chickens escape their coop and enjoy a day on the town in this counting book. The concept begins by counting forward in verse, adding a chicken and an escape-plan element at a time: ...

It is likely that most animals can distinguish between more and less. For example, more friends are always better, as mosquito fish show us in their preference for larger schools (Agrillo et al. 2008) ...

Editor's note: This column originally ran Aug. 17, 2010. The numbers were promising: at $75 for 50 chicks, we couldn't go wrong. Our friend Nat had a brooder box we could use for the first several ...