You can buy a square dowel and cut it up for pieces. And then just use a chess board or draw one on a piece of cloth, like one of those fancier restaurant napkins you can order off amazon.
https://www.homedepot.com/p/1-3-4-in-x-1-3-4-in-X-36-in-Wood-Square-Dowel-HDW8322U/203378795
You could also buy a couple sets of checkers, the larger ones, and then cut them in half so they can stand up
https://www.amazon.com/dp/B00CKZD9ZG/ref=twister\_B083782YM2?\_encoding=UTF8&psc=1
Otherwise the official crazy martin pieces may well be big enough to not having any issues with swallowing honestly.
https://worldbuildersmarket.com/collections/games/products/tak-crazy-martin