We made Rainbow Land for the colorful Trolls themselves (but Rainbow Land for ANY toys will also work)! My kids enjoyed mixing the colors and seeing what new colors they could create all while making it “rainbow style.” They stayed at this play for about 30 minutes; however they added a lot of extra pieces that I forgot to capture!
TO DO: I lined a large storage container with paper towels, filled some cups with water + food coloring, gave them eye droppers and let them play! They loved putting the water on the paper towel and seeing it absorb and spread and then having the Trolls stomp around on it. When the paper towels were all used up, they continued to play by bringing in more cups and containers and more colored water. Success!!