Roylco sent us an amazing toy a few weeks ago: Straws and Connectors, and we absolutely loved it. Right away my daughter got constructing as you can see below. It is wonderful for fine motor control and is recommended for ages 4 and up.
The set comes with 400 total pieces of straws and connectors shown here. So colorful and appealing to children (an adults like me!).
My seven year old daughter decided to build a huge building structure and then put blankets and pillows within it. It stayed in our living room for over a week and it became a structure for imaginary play. This toy can be easily deconstructed and put away, so it doesn't take up much room when not in use. In the instruction booklet there were many examples of endless possibilities for creative building such as making rockets, cars, spheres, and so much more.
Roylco is an educational supply company with so many great resources for teachers and parents. They have endless products to purchase for Art, Crafts, Science, Math, Toys, Multicultural, Language, and so much more. Check out heir website here: Roylco.com. I know that you will find something that would be valuable for your children and their learning.