I dedicated a whole center to stamping. It made it really easy for me to just switch out the worksheets from this Stamping Bundle for the skill we were learning, and the students would already know what to do. At the beginning of the year, we simply started with matching letters. This can be differentiated for some students to stamp the uppercase letter next to the lowercase letter on the worksheet.
Students can work on filling in the missing vowel sound and try to read the simple words. These lowercase alphabet stamps can be found on Amazon as well.