Play doh is a great activity for working many learning areas. You have sensory, art, creativity, colors, and fine motor work. You can easily add in even more.
When I had only one child who played with toys and made messes, I thought play doh was such a huge mess and cinged when that activity came to the forefront. Now it is my favorite! The children sit in one spot and play for an extended period. Sure, little bits of play doh get stuck to the counter and spread on the floor, but the reality is that it is so much easier to clean up than toys spread around the toy area.
Right now, we are loving using toothpicks with our play doh. You flatten out the play doh, take your toothpick and practice whatever needs to be practiced. You can write letters, write names, do math problems, draw shapes, and draw pictures. We love play doh!