I have always loved Montessori sandpaper letters! With babies and toddlers in the house, I wanted to find a safe and easy way to get the same effect but without all of the individual pieces. To make this yourself you just need a sheet of quarter inch plywood. Get them cut to whatever sizes you want. Draw the letters in pencil first and then trace them in Elmer's glitter glue. I chose different colors but you could use just red and blue like the Montessori ones. Let it dry and secure it to the wall in the play room! We have had ours up for over 2 years and it is still perfect! I love that my babies and toddlers can explore the letters without damaging it:)
I also made one for shapes!