content: These are so fun! You can stack them up or put two half circles together to make a ball. I stick the smiley face inside a ball so my baby can shake it and hear the sound. I also take the half circles (not the smiley ball) for bath time as they dry fast and don't retain any water (preventing mold like the squeeshy toys attracts). They're colored and numbered so it's a great learning toy as well.