https://www.basicfun.com/lincoln-logs.html

Great tutorial on how to make the toys

How To Make Lincoln Logs

https://www.youtube.com/playlist?list=PL7H3d1OULjpV2mlDklcuqog7MxXvTsyBL

Some plans for building
https://www.basicfun.com/assets/pdfs/instructions/knex-instructions/lincoln-logs/Lincoln-Logs-Classic-Farmhouse-00843.pdf