Just as an idea of toys/playtime that would fall into this parenting style, look up treasure baskets. They are all household objects that are used for play and discovery. Typically aimed at children as soon as they are able to manipulate the items. Also no adult interaction is "allowed" only observation. Children are to play with the baskets and content as they choose.

I do these on a regular basis and have a number of them set up in my basement ready for rainy days and themes.