Very simple unit. Needed 30 of these.
The units fit together in groups of three. I am usually an origami purist, but tape/glue would have made this a lot easier.
One ah-ah-ah, Two ah-ah-ah, Three ah-ah-ah...
The final model looks good and seems pretty solid now that all the pieces are in place. With an acute angle formed between each spike, it locks the units together pretty well.
20 Spikes total. ^_^