Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Hard to see answers under buttons

I bought this for my oldest son because he is interested in learning addition and subtraction. He has only used it four or five times. He gets frustrated that his finger covers the answer and the plastic is so thick it is hard to read anyway. I remember using this toy when I was young and I thought the manufacturers would have developed a better product since materials have changed so much in the past twenty years.