Seriously though, Here is a knot-practicing post. I made this as a knot-tying teaching aid for a sailing class. As shown, it is sufficient to practice tying:

• Stopper-knots (figure-8)
• Loops (bowline)
• Bends with lines of equal and unequal diameter (reef knot, sheet bend, etc.)
• Knots on a post (clove hitch, 2 half-hitches, taut-line hitch, etc.)
• Cleat knot

Regards,
Eric