The Polliwog is available as downloadable study and construction plans, and printed construction plans. Imperial and metric units.
Polliwog information is available here.
***For those of you coming to the Polliwog from the construction video on YouTube, please be aware that the video refers to older version of the plans. The transition notch has been replaced by a different method of construction. It’s also worth noting that the video on YouTube is unofficial and not posted by Devlin Boats. We have no way to update it.