This is baseless. It is true that in such an age he must not be allowed to play with it out of respect not that he is not in wudhu!

I am from Pakistan. My son is almost 4 yrs old. I go to a ladies gathering where we read quran with tafseer. When my son held quran and put it in his lap and somehow a corner of it touched his feet,everyone sitting there got really disturbed. They said quran isnt for the kids to hold,they dont do ablution,everyone who is watching this kid with quran in his lap will be sinful.

Reading/Reciting the Quran |