Ok, first things first: We need to introduce you to The Nugget.
It's touted as 'furniture for growing imaginations' and is part-toy, part-couch. It comes in four pieces - two triangle pillows, one seat cushion, and one base - and it's made of foam covered in micro-suede.
It's beyond popular, retailing for US $229 (AUD $296) and selling on Facebook marketplace and Gumtree for well over $1000. Buzzfeed even found a reseller trying to ask for $10,000.
Basically, your kids can build forts, or trees, or interesting shapes, but it also looks aesthetically pleasing when configured as a normal couch.