Pequeno Arquiteto seems to be Portuguese for "small architect," and is apparantly used not just for different sorts of toy block sets, but also for different sorts of architects. Short? Small projects?
This particular set came from Brazil and is interesting for being tongue and groove, but without the notches of last week's Jeppe set.
The pieces have a 3/4" square cross-section, not counting the tongues.
Small & appealing block play.