Egg and Chick Center:
I made mini chicks by shrinking chick coloring pages down and adding a photo to each one. Then I colored the chicks. I'm planning on using these during letter 'N' week. So my pictures are of things that start with the letter 'N' and a few that do not. Students will find an egg, pull out the chick and decide how to sort it: words that start with 'N' or words that do not start with 'N'. This is totally customizable to your units and themes.
Bunny and Carrot Center
I made bunnies programmed with letters and numbers. Students will sort them. Is it a letter or is it a number?