My son absolutely loves his wooden train set, he's been obsessed with trains since he was about 1 year old. He's almost three now and still plays with it daily. He makes up these elaborate stories and scenarios and chugs his trains around the track for hours. It's so adorable to watch him create his little world!
He also loves this touch-and-feel book of different textures that we got as a hand me down - it's an old book but in great condition. The pages have different furry, bumpy or silky textures representing different animals and things, and he loves running his fingers over them and guessing what they are. It's so cute watching him feel so proudly smug when he gets one right!
Those simple toys are often the best!