Concrete:
Bird baths: http://www.garden-art-projects.com/concrete-bird-baths.html
Leaf bird bath video: https://www.youtube.com/watch?v=BsIq_pKjRAc&t=332s
Stepping stones: https://gardentherapy.ca/diy-concrete-stepping-stones/
Leaf stepping stones: http://wonderfuldiy.com/wonderful-diy-leaf-shaped-stepping-stones/
Concrete mixing and setting tips: https://www.thespruce.com/using-concrete-for-stepping-stones1253937
Bamboo:
Fences and trellises: http://www.japangarden.co.uk/How-to-tie-Japanese-Knots-make-bamboo-fencesand-trellis-p-24.html
Lashing techniques: https://www.bambooimport.com/en/blog/bamboo-lashing-techniques
Japanese square knot video: https://www.youtube.com/watch?v=uD9NaOsVbII
Bamboo twine: http://www.mastergardenproducts.com/bambootwine.htm
Trellis tying technique: http://www.finegardening.com/video-lashing-bamboo-trellis
Timber hitch knot: http://www.animatedknots.com/timber/#ScrollPoint
Tripod tying: https://www.youtube.com/watch?v=55thqbbYF14