I bought these before my daughter was born and since then I have waved and rattled them to show her the different colors and sounds. She is now 4 months and can grab them and they still hold her attention with the colors and sounds. The only one she doesn't care for is the telephone receptor, red one. The advertisement says 4 pieces, but is obviously a mistake. Of the two round toys, the green zebra squeaks and if for Fee to do, but she loves the yellow rattle giraffe.