Toy recs for a 20mo that aren't just plastic tat?

Hoping for some fresh ideas from you lot…

Lysle (20mo) seems to have the attention span of a gnat with his current toys. i feel like ive bought all the usual stuff and it all just gets thrown after 5 mins. Looking for something a bit more engaging, that encourages a bit of problem solving maybe?

Has anyone found any brilliant subscription boxes or even apps (toddler appropriate obvs) that are actually good? Or any wooden toy brands that are worth the money? need to stimulate his little brain!

TIA x