When Derin goes to his nursery, he has to find his name tag and stick on a peg to hang his coat. Therefore he now can recognize his name and if a he comes across one of the letters in his name, he gets excited and says "Benim, benim!" (Turkish for "mine")
The inspiration for this sensory tray came from Deborah at Teach Preschool. Deborah uses name tags hidden in a coloured rice tray for her students.
I have yet to color a bag of rice so I used oatmeal and our magnetic letters. Derin (28 months old) likes scooping and handling the oatmeal and finding his letters.
It is important to expose children to lower case letters as most of the reading is done with these. Capital letters are only used at the beginning of a name or a sentence in English (or Turkish in our case). So if you intend to buy letters for this kind play, I would encourage you to go for lower case letters even though they can be a bit more expensive.
Charlotte at Make Do And Friend also has a similar sensory tray for an Alphabet Soup activity which is also great for playful learning.