For $5 I am disappointed... There are free apps with better quality than this. My daughter is 4 years old and within the first 10 mins of playing with this game said "Why is the tracing sound so loud? I cant hear the sounds of the letters..." when playing the game myself I soon realized the phonetic sounds of the letters are a whisper compared to the overbearing sand paper tracing sound. Perhaps just a glitch with volume levels... With that said dont pay 5 bucks for this app!
Monica Smart about Montessorium: Intro to Letters