I created the files for a friend who wants to make Timmy Time cookies for her 3 yro son. I've never made any cookie cutters before, so I wasn't sure which version will work. Might need to get some play-doh to try out.
A snowflake cutter. Designed for making snowflake soaps, it's also fine for cookies. I also made a thing for pushing the soap/dough out of the cutter if it gets stuck inside. It saves a lot of time over poking it out with a q-tip or something.