These plastic letter stamps are helpful for embossing fondant or gum paste designs with letters or numbers. It's not an essential but it's a nice option! (Their intended use is for stepping stones, but they wok great on fondant and gum paste.)
"MILESTONES-Stone Stamps. Personalize stepping stones the easy way. Just press these letter or design stamps into the wet mix to create perfect impressions every time. This package contains twenty double- sided alphabet stamps. Stamps are made of durable plastic. Available in a variety of fonts: each sold separately."