Rhode Island Reds lay well and provide a good size medium brown egg…..Salmon Faverolles a favourite of mine absolutely brilliant with kids and people very friendly, lay well and provide a good size tinted egg. However they do have feathering to the feet!.
Buff Orpingtons again very friendly and good with kids OK layers although some strains are better than others, very nice in a mixed flock though! They lay brown eggs.
Already mentioned cream legbars and Brown Leghorn's. in particular Leghorns I always feel get a bit of bad press but for me as a layer they are my number one, tough as old boots and great foragers. Yes they can be flighty at times and appear unfriendly keeping their distance but they do settle with good interaction.......Huge white eggs and plenty of them throughout the year, the Exchequer Leghorn in particular is a beautifully marked bird
Hope this helps a tad ,but just my take on chooks……….enjoy your project!
Dave