Make your own reusable tray for a homemade volcano. Use ceramic tray for potted plant. Hot glue gravel and plastic dinosaurs around edges leaving circle in middle. Glue plastic bottle in center. Then build volcano from sand and put appropriate ingredients in bottle to create volcano. When done rinse everything and repeat another day.
Erupting an Easy Homemade Volcano! We just made one and used a lot of different colors, the best was the blue food coloring, although lava is to be red that is the fun of home projects changing them up a little ;)