I know how shy those egrets can be. I see them sometimes when out running, but they usually fly away before I get my phone out. I need my camera with the decent lens to catch them from further away.
Have fun with the kids. My kids seem in no rush to have their own little ones, but I know my mum would love a great-grandchild.
Having fun with those 2 little ones is a sort of training for me, so I will be ready when my daughter will decide to have a baby (like your kids, she seems in no rush to have her own little one). :P