Wooden Braille Blocks from Little Sapling Toys

https://www.littlesaplingtoys.com/products/braille-alphabet-blocks-tactile-wooden-letters-toy

This company creates high-quality organic wooden toys. Many of their toys are very simple and thus accessible for any child, but our favorite has to be their Organic Wood Braille Alphabet Blocks (just search for “braille” on their site).