Great toys/activities for development?

[Frogandbear]

My DS is 3 and has asd. I am always looking for toys that will aid his development, as he loves new things and loves to learn, but now I am finding it difficult to find things to interest him that are a bit different.

Over the past year, he has gone through the usual sorters, stackers, building blocks, puzzles, letter and number toys, melissa and doug toys in particular I love, but I'm struggling to find something new for him.

Anyone got any toy recommendations for this age?

What zzzzz says.... plus

Pop up pirate or Snail Race for turn taking.
Snap/Matching pairs cards

Tyger sell a cheap balance board for vestibular integration, or there is a fancier balance board game on amazon that I can't remember its name.
Garden swing and trampoline
Mookie ride on or balance bike
Twister

Kerplunk and pick up sticks
Tiddly winks
Maybe a bit early but The Greatest Dot to Dot in the World for building up handwriting skills by stealth! Similarly large mazes to help motor planning.

Conversation starters - we like talking about I Spy Books of Picture Riddles and other picture books
Social stories - Cherie Meyers has pre-written books with nice illustrations

Piles of recycling and double sided tape for junk modelling
Gardening, cooking, chores etc
Art materials