Prohapi via Amazon offers its Prohapi Felt Letter Board in Blue for $18.99. Coupon code "OOFMJR7D" cuts it to $9.49. With free shipping, that's $10 off list and the lowest price we could find. It has a stand and wall-mount hardware and includes 340 plastic changeable letters, symbols, numbers, and emojis. Deal ends June 17.

Note: It's also available in Pink for $9.99 after the above coupon.