I actually think that, subject to safety and level-of-responsibility consderations, there are various basic "tools" (penknife, hammer, screwdriver, drill, pliers, magnifying glass/lens etc.) that children should be introduced to as soon as possible because they then aquire practical skills, knowledge, aptitude and thus inclination to be able to do things for themselves rather than relying upon (and this paying for) someone else to do things for them.
For example: I was given a screwdriver at the age of about 5 and I have never looked back (and somehow survived).
My brother was never the same-way initiated / inclined and our lives have noticably different "costs" as a direct result.
But a nephew from another of my siblings is turning out rather like me (poor-probably-not-so-poor lad).
It also inclines them towards fixing and repairing things rather than simply buying shiny new stuff.
You learn to appreciate something that, whilst not necessarily aesthetically beautiful, something can be highly functional and reliable and thus useful.
Oh dear I seem to be slipping into a grumpy old man rant again