Question About Gerber Puffs?

I seen these in the store today and I know they are graduates but it says they melt in your mouth....if I break them into pieces can my 5 month old have them? He has been on baby food for 2 months. I did not know if they were safe or not... what age is a good age to start? When you do start considering they "melt" in mouth is there less of a choking hazzard or not?