I have a few ideas for projects using ratchet mechanisms. First up, this as-yet unnamed bird and worm model. I'm planning to use a four or five toothed ratchet. Pull the tab on the front of the model and the bird will pull the worm further and further out of the ground before snapping back down again.  

After a frustrating afternoon struggling with a clogged printer, here is the first draft. A fair way to go yet, but the good news is that I've started. Often the longest part of any project is the part where I'm gazing vacantly into space trying to work out what I'm going to do and how I'll do it. That stage is done. Now for the easy bit 🙂