Painting with marbles - an art idea for toddlers and up that's a bit messy but great fun, and the results are lovely!
marble painting – Noteworthy Mommy
Dan & Darci Marbling Paint Art Kit for Kids - Arts and Crafts for Girls & Boys Ages 6-12 - Craft Kits Art Set - Best Tween Paint Gift
Art with Alyssa: Marble Painting
Marble Painting: A Fun Art Activity for Preschoolers
Shaving Cream Marbling Process Art Painting
Glitter Marble Painting – Housing a Forest
6 Easy Paper Marbling Techniques
Painting with Water Beads and Marbles Preschool activities toddler, Water beads, Fun activities for toddlers
Painting With Marbles - Kids Kubby
Original Stationery Rainbow Marbling Kit for Kids, to Make Marble Art and Craft Kids Will Love, Great Arts and Crafts and Rainbow Gifts for Girls : Toys & Games