The very stuff of nightmares! I grew up in the 70s and had a fine time with Lego. Plastic was the future and so I missed being force fed Meccano every birthday and Christmas; a mercy as I have come to learn.
Only now has my young son been gifted his first Meccano set by some misguided relative for me to "help" him with. His fingers are small enough... but his love of tightening tiny nuts on to tiny bolts is just not there yet. It's sadly up to daddy fat fingers to "help" him complete the task. No. No thank you. Never again.
When I shuffle off down below there will be a Meccano set waiting for me - with one nut missing.