I like the colored eggs from the americanas, I'm also thinking a silver laced wyandot and black australorp. Nothing too mean because I have young kids.
Those are good choices for children. Actually it is Easter Eggers which lay colored eggs (true Ameraucanas lay only blue eggs). Most Ameraucanas (frequently misspelled as Americana or Americauna) sold by hatcheries (and frequently misspelled as Americana or Americauana) are actually Easter Eggers which are hybrids produced by crossing true Ameraucanas with other breeds to produce offspring that lay eggs in colors other than just blue (olive, green, beige, and even pale pink or gold). Our Easter Eggers are my granddaughter's favorite hens. She loves the different colored eggs that they lay. Black Australorps are my personal favorite, standard breed. I've raised them for years and they are extremely hardy, calm and gentle (my children, and now my granddaughter, made lap pets of ours), and they are the best layers of the standard, brown egg laying breeds. Other breeds that are very friendly and gentle are Buff Orpingtons (we have some currently in our flock), Cochins, Brahmas, Sussex, Silkies, and Faverolles. Raising chickens is a wonderful experience for children (especially with the right breeds). My granddaughter (pictured in my avatar) loves our chickens.