They are like a business card for moms. Handy and convienent, these cards have your information on them just in case you see an old friend at the park and have no pen.
If your child is having a play date you can just give the other parent a mommy card. You will know that they will have the proper contact information.
Flowered card – $50/100crds (double sided) at Cards for mom
Sandbox Card – $4.99/10crds at Carries Kiddie Closet