Shatterproof ornaments are usually made of plastic that looks like glass from a few feet away. Large sets of 50 to 100 pieces are the easiest way to decorate a full tree in one coordinated color scheme, and they are the safe choice for homes with toddlers, cats and dogs.
Look for sets that mix sizes, such as 1.5, 2.4 and 3 inch balls, plus a few shaped pieces. Mixed finishes (shiny, matte, glitter) give depth. Check that the caps are glued in place and whether hooks or strings come attached, which saves a lot of time.
Decide on your colors before you buy. Classic red and gold, silver and blue, or a monochrome look all work; a good set will cover the basics so you only add a few accent pieces. Check that hooks or strings are included.
Add a few statement glass ornaments up high and a matching tree topper to finish the look.