Speaking about anecdotical evidence:

We came from the supermarket the other day, DD, DS (22 months) and me. While I am putting the TV to DD, DS disappears into the kitchen and is looking for something. He comes back with three 'actimels' (taken from a package of 4), and gives me one, another to DD and another one for himself.

It was not random, he went deliberately looking for them and came with a triumph face carrying the three of them.