Enjoy a sing-a-long with a group of children that can easily include a disabled child, or a number of disabled children, in the activity. A sing-a-long provides an activity that allows all kids to shine and doesn't emphasize the difficulties or disabilities of any one child. Even a child who can't sing can enjoy the rhythms and action of listening to other children sing.
Decorating cookies provides an activity that doesn't have a "right" or "wrong" answer or a correct way to do something. Prepare the toppings and the cookie dough and let each child, disabled or not, decorate the cookies as they wish.
Read books with the child. Almost all children enjoy cuddling with an adult to hear a book read to them. You can find books that meet almost any child's intellectual and emotional abilities. If the child has hearing disabilities you can "read" the book using sign language -- and if the child has sight disabilities you can find books for young children with tactile stimulation. According to the child's abilities, you can engage the child in the process of reading the book by asking the child questions as you read such as "What do you think will happen?" and "What would you do if this happened to you?"
Involve the child in a gardening project. Plant, weed and water the garden together or, if the child has the ability, give the child responsibility for her own area of the garden. Most children enjoy the feel of earth on their hands and they can learn about the growth cycle of plants while enjoying the success of watching their plants grow.
Bring the child to a petting farm or bring animals into the child's environment. Research on the benefits of animal assisted therapy for special needs children, as well as recorded case studies, emphasize the beneficial effects of animal presence for special needs children. You can allow the child to stroke an animal or play with the animal. Some children push themselves to accomplish tasks with an animal's help.
Take your child swimming. Some children benefit from the social interaction and physical exercise they get from a swimming session -- while others need specially heated pools and trained personnel. Hydrotherapy in different forms provides an enjoyable and stimulating activity for disabled children.