Building rock tumblers is a project that can help children understand the geological process of the tumbling and smoothing of rocks in water bodies. A homemade rock tumbler is also a creative way of making polished rocks and stones for adornments.
13 Creative DIY Home Decor Ideas with Pebbles and River Rocks
Stones painted as strawberries when put around strawberry plants in the spring will keep birds from eating your ripened berries. Birds experience the stones first and will think the ripened berries are rocks.