I had always wanted one of those DIY busy boards for my kid! Never had the money to get them made by someone else, and his father kept making promises that he would make one but... I guess glug-glug-glugging is a way better thing to be doing instead :)
Awww.... the good news is you can get a lot of these household trinkets at second round stores for nish... I've got some sweet sweet pieces of furniture from these: https://sobraltsobrale.ee/kauplused/ And to be honest, there's even no need powertools, one could use an old cupboard door and some rope/ribbon to attach items, your kid will just be happy for some new trinkets to mess with.