Favorite building toys as a kid?

My 7yo has proven an curiosity in constructing & design since he was 2. I can completely see structure in his future. It's his most constant curiosity (plus bugs 🫤) and I need to nurture it. Apart from legos & magnatiles, what have been a few of your favourite constructing toys (or are there any cool new ones) that you just liked?

Thanks from an obnoxiously, intentional (and inventive) mother 🙂

* Edited so as to add pictures of what my boys at the moment construct with. After reviewing some feedback it appears like we're heading in the right direction! Which is tremendous encouraging.

https://preview.redd.it/kkqd2jpkk26e1.jpg?width=4032&format=pjpg&auto=webp&s=bae0c67aad5efa271213d4c89ae5d2bb19185115

https://preview.redd.it/fp971kpkk26e1.jpg?width=2268&format=pjpg&auto=webp&s=1883453102f0e566b1c4a7b236eb5e80495679c0

https://preview.redd.it/0u8s6jpkk26e1.jpg?width=4032&format=pjpg&auto=webp&s=036e9c0a5d7e2e61c5db2c0a9bdde66e70c2096e

https://preview.redd.it/5bycslpkk26e1.jpg?width=2268&format=pjpg&auto=webp&s=d8c30ee7287473f5186ae9202f8cc358aa1269ce

https://preview.redd.it/egi11jpkk26e1.jpg?width=2268&format=pjpg&auto=webp&s=573660d333a353c3812b6821c59f6f84fdd760c3

https://preview.redd.it/gvrj5lpkk26e1.jpg?width=4032&format=pjpg&auto=webp&s=abd8becc189cb52eb4e8d1ab8c2b1ccd1f9e1ef5

He’ll construct with something lol, so not a toy but when anybody is aware of of one thing this huge that's quality- I'm recreation! 🙂