Yes you can go to Lakeshore Learning and buy texture brushes BUT why do that when you can easily create textures on your own.
While looking at the pictures of those brushes that cost $23 I decided these household items could create the same effect.
1. Roll up a newspaper and tape it in the roll, dab the end in paint and it will create a spiral pattern.
2. Cut strips of fabric and leave them loosely falling at the bottom, tape together at the top to allow little hands to grab it like a handle.
3. Go to the grocery store and buy a bath sponge
4. Take a kitchen sponge, fold it in half, then tape the top.
5. Use a feather duster
You can use almost anything to create different textures. Feathers, sticks, rocks, a variety of fake flowers (how is each flower different), sea sponges, stenciling brushes.
You could take potatoes and carve different shapes and textures into the potato. You can do the same thing to erasers (you know the larger rectangular pink ones) and use them like stamps (that don't rot)
That having been said I am in love with Lakeshore Learning's Catalog.
Photos to come
