Here is an overview of the Letter Ss tray.
For the beginning sounds for Ss we have: sunglasses, seal, soccer ball, seeds, sun, seahorse, sailboat. I try to stay away from blends and digraphs (sl, sn, sk, sh, st). I found the objects at Michael's or A. C. Moore.
I got this on Zulily awhile ago.
I got this file from Montessori Print Shop but I had to change some of the pictures because they were blends.
The pictures come for a Scholastic eBook I got for $1.