Love them, Love them, Love them!
We had the original alphabet one when the twins were 2 or 3. We did lose some letters, but when they turned 4 we got the Word Whammer...which is just like the alphabet one, but it reads 3 letter (cvc pattern) words. The best thing is it comes with the alphabet and has extra letters too. So now we have multiple letters. I love them. Those magnets really stick and don't fall off like most alphabet magnets. And we still use them to this day to form words for homework!