Welcome, Barbara, and what a lovely idea. If the child was named, you might search our database using his name to see what pops up. Or anything with 'angel' in it. I've done that for ideas for a memorial garden I am planning - lots of iris and daylilies have great names (another option). Or, I like your idea of a small tree (or perhaps a shrub) that can be potted until they move to a more permanent location.