The question "What exactly is neuroplasticity, and can it be demonstrated with a simple experiment?" was closed because of off-topicness due to self-help. The only reference to a do-it-yourself was one of the sub-questions whether plasticity could be tested at home. The title was a bit unfortunate as it disregarded the core of the question, namely what is neuroplasticity. I removed the self-help and I hope for it to be re-opened. Please note my edits were started after the first few close-votes were in, and have continued after closure. So, please (re-)assess the edits and the question.
The thing is that there have been other questions with way more far-reaching implications posed as do-it-yourself home-based experimental questions. Notably the well-received question How to obtain bacteria samples at home? that talks about "cool pathogenic bacteria" and the extensively answered and upvoted Is it possible to genetically modify a plant at home? and Are there ways to speed up the growth of plants? and the list continues.
Why was this question put on hold, as there was only a mention of "Can I test brain plasticity at home?" Answer: No. There you go. The other questions above were way more targeted at irresponsible home-baked experiments and were not only allowed, they were heavily upvoted and elaborately answered.