I’ve also been making up little games and just using what we have around the house. Noticed he was struggling with identifying colors so put some circles on paper and started matching first, now he can identify more of them
My sons favourite toys are literally anything with wheels he has so many cars
Not sure they're stimulating but my LO currently likes his Iggle Piggle for comfort moments, cars that roll along when pushed, taking things out of box/tube and putting them back in and rattling them around in box, stickers