Mag Chalkboard Paint: Paint a wall, have some craft activities to have her make castle/house/outdoors/etc pieces (modular ideas so she can build the castle in many different configurations). Also could use chalk to outline and draw.
How to make natural paintbrushes. We love to go on long nature walks and find bits and bobs to craft with. Forest school activities are so much fun and these thrifty crafts are just so much fun to make. Nature crafts are often the most beautiful too and the most interesting these natural paint brushes make the best textures and they look gorgeous too.
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14 DIY Projects That'll Make You Ditch The Paint Brush