A way how you can decide whether or not a how-to is suitable for this board is to change from how-to, to a completed version.
For example; Using one of the first popular threads in this board with the sentiment of "How to make a hamster powered device" changes to the completed version; "I've made a hamster powered device" If it sounds like it would be suitable for the Tactile board in that form, then it's certainly a how-to for the How To childboard!
An example of an unsuitable how-to discovered using the previous method and the "Where can I get a human skull?" thread, would be; "How to get a human skull" to "I've got a human skull", nothing was made, nothing tactile, so a post consisting almost completely of "I have a human skull" wouldn't last very long in the Tactile section and so is not suitable for the How To childboard.