I had a bido / dibo construction kit 20 years ago, it was teen/adult construction set, the original kit you could build a house with a patio, and had german writing on the box. it came with large red and white panels in the box for construction wall sides, and windows, doors. Also had connectors and peg like joiners, similar to a joint, so you could move left/right up and down.

Accessory kits were sold and came in Triangle boxes, and often were sold in small shops for a few pounds. Each box often had a theme with the kit. (ie: an AA gun had war netting painted on the box). You can add the additional sets to your collection, and build different objects with the extra parts.

you could build anything from houses, to motorcycles, guns, tanks and transformers.

Before anyone says, BILDO, it is not lego...

I have been unable to find these anywhere and wondered if anyone knew if they still existed. (wish i had kept it now)