I would have liked to know if these blocks were stack-able, they are somewhat difficult to stack on each other even though the picture seems to do so well. My son does love that each block has something different two have different rattle sounds, one has an interesting crackling sound and one has a little squeaking button and of course he likes the little taggies. My son is 10 months, I wish I would have gotten these sooner for him to play with, I still got him some stacking cups which he LOVES to knock over!