I found a 100 ounce bottle of Miracle Bubbles bubble solution at WalMart for $2.50. I also bought a package of different bubble blowing toys for less than $2.50. I like how the toys come with a wide, low-sided tray for holding bubble solution. That reduces the amount of spillage! This has entertained my three-year-old for hours. The boys take their books outside and I work with them while my daughter plays with bubbles. My 12-month-old loves watching the bubbles flying.