@neauoire the generic name I've heard is "bristle blocks"; these particular ones are B Toys, which have very nice colors.
mybtoys.com/product/bristle-bl

@phooky always helpful to visualize the normal vectors

@phooky wow! You are responsible that you woke a memory from very far part of my brain! Thank you very much, I usr saw those blocks and was like "Wait wait .....wait--- waaaaiit"*Childhood memories restroed* WOW!

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