With kids involved I would personally avoid Leghorns. While they are great layers, they are typically high strung and flighty. Mine screamed bloody murder whenever I handled them and my kids hated them. I would suggest either going with Australorps which are extremely hardy, calm and gentle (good lap pets), and excellent layers of brown eggs, or else Sex Links which are generally docile egg laying machines. Red Sex Links (sold under a number of labels such as Cinnamon Queens, Isa Browns, Golden Comets, Red Stars, etc.) would probably work well but I personally prefer the Black Sex Links (Black Stars) as mine have been typically been friendlier than my Red Sex Links and have had a longer laying life. Either way though both Sex Link varieties will churn out more than 300 large brown eggs per hen per year and should work fine for your kids.
Edited by Michael OShay - 2/8/16 at 11:56am