The Piklers are a wonderful developmental tool for toddlers and young children. They help develop confidence around a child's movements, gross motor abilities and balance, and they can be used for so many different things - car ramp, tents, stuffy slide, puppet show booth, or boat, to name a few of my son's ideas...
...BUT I've had many parents contact me, worried about the size, especially if they don't have a dedicated play room.
I completely understand, we live in Toronto and our living room and play room are one and the same.
We do have Pikler but I'm often collapsing it and setting it back up, which can be a bit of a pain.
However, if you're really tight on space or just don't want the hassle of regularly collapsing it/setting it up, we recommend the Waldorf Balance Board > https://www.themontessoriroom.com/product-page/waldorf-balance-board
It's smaller, easier to store, and offers many of the same benefits as the Pikler Triangle.
-> It helps develop gross motor skills, coordination, and balance
-> It's open ended with many of the same play possibilities as the Pikler - ramps, bridges, doll cradle, slide, tunnel, market stands, etc
-> It made of wood and built to hold an adult
The main component you're missing is the climbing element, which is nice when your children would otherwise be climbing on the furniture.
You can read more about it here: https://www.themontessoriroom.com/product-page/waldorf-balance-board