This is a set of blocks or decide 6 characters to put on your own blocks.
You can use it for test prints and then maybe toss them to some toddlers to play with. The current scale is almost 1 inch though, so I guess you might want to scale it up when you slice it if you will be giving them to toddlers. They might choke on something 1 inch.
Do not print with supports. You would probably never get the supports off if you did and the next layer up will not stick out more than 0.2mm before scaling. I can add additional quality later, if people want. Just ask in a comment. In fact, I just tweaked the OpenSCAD file so that it has twice the resolution for the slopes in the letters. I just did not bother to render and export the STL files again. Enjoy!