Time to teach a child how to differentiate or similar and differences? Then let's get a few items from the kitchen! Anything metal and magnets.
Theme (animals vs people)
Numbers vs letters
Foods they like or don't like
You can make or buy the magnets. To make them, print off the picture from your computer (card stock is best) or magazine cut out. Then, glue down the image to a cheap magnet. I re-used the magnets I got free from the dr office and advertisements.