>>8086278While there's no official confirmation, can say that the minifigs are identical and the plastic quality is about the same, so yeah it's fair to conclude that they're a rebranded Block Tech. I got a Play Day ambulance and it was just an awful build, very clunky and poorly designed. Thing is, Walmart still has Block Tech stuff as well, though they seem to be trying to clear them out lately.
As for other brands, ones I've seen include Make-It Bricks at Dollar Tree (alongside Block Tech); Dragon Blok at TRU and Canadian Tire (a sub-brand of Wange, famous for the blockhead minifig); BanBao and Montoy at Dollarama (the latter make lots of other toys too); various Chinese brands at the liquidation centre (Kazi, Weagle, Wange, Enlighten, Bela, Elephant, Sluban, Sheng Yuan, Lele, Dargo, CB, Bozhi, Loho, Zhiling, Decool, Sembo, Jie Star, WInner, Gudi, Starmerry, Zuanma, Mindbox, Great Friend (some more I'm forgetting, and a few that were without any kind of brand).
Pic related came from Dollarama, box just said Brix and boy does it stretch that ubiquitous phrase "contents may differ from picture on box".
